(49 customer reviews)


WEIGHT: 41 OZ | 1,162 GM
VOLUME: 4,200 CU IN | 68 L
MAX LOAD: 35 LBS | 16 KG

Lets face it, every mother has a favorite child – ours is the Circuit. Weighing in at less than 41 OZ, we don’t think there’s a pack out there that can compare to the load carrying capabilities, comfort, and durability of the Circuit.

Choose a torso size, then the shoulder strap option, then click on color, and it will show you what we have in stock ready to ship. If you don’t see your color you can choose the “make to order” option!

    Reset options

    ** Is the color you wanted currently out of stock? No worries! (+$15.00) Select "Out of Stock / Make to Order" in the pack color dropdown above, then select the color you were hoping for from the dropdown below and we'll make it to order for you. Please note, order times increase 1-2 days when selecting this option. There is no restocking fee to return a "Make to Order" pack. However, the $15 fee is non-refundable.

    Add a ULA Hat to your purchase for only $12.00! Pick your hat color, then customize your hat by choosing one embroidery color for the mountains in our logo and one color for the logo text.

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Lets’ face it, every mother has a favorite child – ours is the Circuit. Weighing in at less than 41 OZ, we don’t think there’s a pack out there that can compare to the load carrying capabilities, comfort, and durability of the Circuit pack. If you have your total pack weight down around 30 pounds and want to feel the freedom of traveling light, this is the pack for you. The Circuit has been the most popular pack on the Pacific Crest Trail for the past 3 years according to the Halfway Anywhere annual survey of PCT thru hikers.

The Circuit pack utilizes a 1.2 OZ carbon fiber and Delrin suspension hoop in conjunction with a dense internal foam frame and a single aluminum stay to give you excellent back panel support, maximum load control, weight transfer, and pack rigidity without limiting your range of movement. The Circuit can be ordered with a 12″ to 18″ adjustable harness system that works great for kids. In fact, the youngest person ever to backpack all 2,660 miles of the Pacific Crest Trail was carrying a Kids Circuit!

Original Green, Black, Red, Orange, Blue Blaze, Teal, Grey, and Purple packs are sewn with our 400 Robic Fabric, the toughest stuff ounce for ounce we’ve ever seen. The Multicam Camo pack is sewn with 500 Cordura Fabric. The Cordura is not quite as tear resistant and a little heavier than the Robic, adding an extra 2 oz to the total pack weight. Now Available in Xpac! Read the “Customization” section below to learn more.

This is one tough pack that will give you years of hiking bliss, even if you are a bit tough on your gear. This pack will take the abuse of a 2,600 mile hike and beg for more.


Removable features are in bold.

  • Internal Suspension Hoop
  • Padded Backpanel
  • Contoured Shoulder Straps
  • Front Shock Cord
  • Front Mesh Pocket
  • Dual Hipbelt Pockets
  • 400 Robic Adjustable Side Pockets
  • Rolltop Closure
  • Side/Top Compression Straps

  • Ice Axe/Pole Retention Loops
  • Bear Canister Capable
  • ULA  400 Robic
  • 400 Robic Bottom Panel
  • Hydration Sleeve (1.4 oz)
  • Internal Stash Pocket (1.1 oz)
  • Water Bottle Holsters (0.8 oz)
  • Handloops (0.8 oz)
  • Single Aluminum Stay (2.0 oz)


You can customize the color and fabric of your ULA pack! Select “CUSTOM” under the “Pack Color” dropdown, and add your pack to the cart. Then go to our CUSTOMIZER page, select the level of customization you want and use our pack customizer to customize the look of your pack! NOTE: Custom charges are not refundable and returned custom packs will be assessed a $35 restocking fee.

Want your Curcuit sewn with Xpac Fabric?! Either check out our XPAC CIRCUITS OR choose “CUSTOM” from the “Pack Color” dropdown above, then head on over to our CUSTOMIZER page. Once you select your level of customization, you will have the option to choose “STANDARD” OR “XPAC” fabric! And guess what? Even the 2 Color Custom Xpac option will be fully Xpac!


TRAIL NAME EMBROIDERY (+ $15.00): Now you can have your trail name, or your real name, embroidered on your backpack! Not only is it a nice personal touch, but it’s a great way of identifying your pack no matter how or where you travel. Simply write your trail name, or your name, exactly as you want it to appear on your pack, in the text field above. Then, choose your thread color and font, and we’ll personalize your pack for you. Packs that have trail names embroidered on them are still returnable, minus a $35.00 fee. The cost of the trail name is not refundable.


TOTAL WEIGHT: 41 OZ – 43 OZ | 1,162 – 1,219 GM *
Listed weight is for a size medium torso with size medium hip belt. Our weights are as shipped including all the removable items. In the case of the Circuit, removable items total about 6 OZ.

NOTE: MultiCam Camo packs are made with 500 Cordura Fabric Which adds about 2 OZ to the pack weight.



“Base weight” refers to the total weight of all gear carried — including the weight of your ULA backpack. This weight also includes things like water bottles and food stuff sacks, but not the weight of water and food as this will vary during each trip. Knowing your base weight will help you determine which suspension system will best handle your load on the trail.


TOTAL VOLUME: 4,200 CU IN | 68 L

Breakdown (Cu In):

Main Body: 2,400
Front Mesh Pocket: 400
Left Side Mesh Pocket: 400
Right Side Mesh Pocket: 400
Extension Collar: 500
Left Hipbelt Pocket: 100
Right Hipbelt Pocket: 100



With the exception of the MultiCam Camo Circuit (See Below.) Circuit packs are sewn with our new ULA 400 Robic fabric, the toughest stuff ounce for ounce we’ve ever seen.

Colors Available: Original Green, Black, Orange, Red, Blue Blaze, Teal, Grey, Purple


**The Multicam Camo pack is sewn with 500 Cordura Fabric. The Cordura is not quite as tear resistant and a little heavier than the Robic, adding an extra 2 OZ to the total pack weight.

Colors Available: MultiCam Camo


For men, use the waist size of your pants and add 2 inches. The “HIPBELT SIZE” option above includes numbered measurements. The number you calculated (waist size + 2) will determine the size you need. If you are on the outer edge of a size, order the next size up! Example: If you wear a size 36 pant, add 2 to get 38. Since 38 is the last number of the Medium Hipbelt and the first number of the Large Hipbelt, you would want to order a Large.
For most women, measure the smallest part of your waist and add 5 inches. If you are straighter through the hips, add 3 inches instead of 5. The “HIPBELT SIZE” option above includes numbered measurements. The number you calculated (waist size + 5) will determine the size you need. If you are on the outer edge of a size, order the next size up! Example: If your waist size is 26, add 5 to get 31. You would need a Small hipbelt.


Torso measurement is the best guide we have for proper pack fit, but it isn’t foolproof, there are many other factors which will determine a proper fit. If your torso measurement is between 2 sizes or doesn’t make sense for your height, email and he can guide you along. If you are between sizes on the hipbelt it’s best to go with the larger size, it gives you more padding and puts the pockets in a better position.

To accurately measure your torso length for a correct pack fit, grab a buddy and follow the steps below…

  • Standing upright, tilt your chin to your chest.
  • Locate the largest lump on the back of your neck. It should be located close to the base of your neck.
  • From this large bone, measure (with the flexible tape) down the length and natural curvature of your spine to the top of your waist band, the top of which is resting on the top your hipbone. This measurement in inches is your torso length.


SMALL 15″ – 18″ UNDER 5’6″
MEDIUM 18″ – 21″ 5’6″ TO 6’0″
LARGE 21″ – 24″ 5’10’ TO 6’4″
X-LARGE 24″ + OVER 6’4″

Have any questions or don’t quite fall in the normal range? Give us a call or send us an email!


The J straps are the traditional straps, and work best on most men with average builds. If you are very large in the upper body you might need XL shoulder straps, give us a call for that. Many men with athletic builds, i.e. strong, square shoulders will find the S straps work better. Swimmers, climbers, weight lifters, surfers, triathletes, XC skiers, etc usually prefer the S straps.
The S straps work best on almost all women and men with square shoulders and good posture. If you are a short torso, but with a larger upper body, give us a call, we may want to give you a slightly longer strap, there’s no charge for it, so don’t be shy, pick up the phone or send us an email.




A: “Base weight” refers to the total weight of all gear carried — including the weight of your ULA backpack. This weight also includes things like water bottles and food stuff sacks, but not the weight of water and food as this will vary during each trip. Knowing your base weight will help you determine which suspension system will best handle your load on the trail.


A: The J straps are the traditional straps, and work best on most men with average builds. If you are very large in the upper body you might need XL shoulder straps, give us a call for that. Many men with athletic builds, i.e. strong, square shoulders will find the S straps work better. Swimmers, climbers, weight lifters,surfers, triathletes, XC skiers, etc usually prefer the S straps.
The S straps work best on almost all women and men with square shoulders and good posture. If you are a short torso, but with a larger upper body, give us a call, we may want to give you a slightly longer strap, there’s no charge for it, so don’t be shy, pick up the phone or send us an email.


A: Each side pocket can accommodate two 1-Liter ‘Big Slam’ style bottles. A Nalgene-style bottle will also fit, but in your quest to lighten up, that should have been replaced a long time ago! In general most people can reach back and retrieve a bottle, drink, and return the bottle to the pocket without removing the pack. The top of the side pockets are angled for easier access, and adjust singlehandedly with a cord lock and internal bungee to open and close.


A:Every bear canister on the market will fit into the Circuit vertically. Unfortunately bear canisters will not fit horizontally. Keep in mind it is best to pack something between the hard sided canister and the bottom of the pack.


A: If you are using an inflatable pad, I recommended storing it in the interior of the pack to avoid punctures. A foam pad can easily be secured beneath the top compression strap that goes over the top of the pack or beneath the front shock cord compression. Although not necessary for optimum performance, positioning your sleeping pad into the interior of the Circuit (against the back-panel) is also a good solution.


A: The suspension hoop used in the Circuit is our minimal solution to transferring load between shoulder and hip. If you imagine an upside ‘U’ you get a sense of how the hoop is positioned and how it functions. The upper arch of the ‘U’ ties into the shoulder straps, while each leg of the ‘U’ ties into the hipbelt. These points of contact allow for a range of suspension flexibility while being rigid enough to support loads up to 35 lbs. In addition, because the suspension is located on the periphery of the pack body, and the back-panel is stiffened slightly with dual density foam, the result is a pack that can handle the load but does not dictate your body’s movements — but rather responds to how you move. Personally, when the loads are kept below 35 lbs, we find this pack to be the most comfortable in the ULA line-up.


A: The top of the pack closes like a dry bag (also known as a rolltop) very similar to what river runners use to create a water resistant seal for their gear bags. The back of the collar is slightly taller than the front. Once you are packed, the collar can be rolled down upon itself to effectively create a barrier to water penetration. Once rolled, each side of the collar can be buckled to the sides of the pack or the two yellow buckles on the top can also be fastened to each other.

As for access, once the collar is rolled and fastened shut, you would need to unbuckle the compression straps and unroll the collar to access the inside of the pack. However, the roll-top only needs to be rolled shut when the weather dictates. If the sky is dry, the collar can simply be folded forward. Vertical compression can still be achieved by buckling the collar to the sides of the pack.

49 reviews for CIRCUIT

  1. Jennifer Stuart (verified owner)

    I ordered a custom made pack as my size was out of stock and Chris got it shipped out to me in record time before a trip. The pack was wonderful! It handled the weight I put in it perfectly. I only wish I had upgraded to this pack years ago! I also really appreciated the S straps.

  2. Nicole Jefferson (verified owner)

    11/10 would recommend! I shopped for months for a bag that was not only comfortable, but locally made. I found ULA from the outdoor research review. I spoke to Chris numerous times and he was nothing but awesome with helping me figure out the best bag and fit. I’ve taken this pack all over my home state of CO this summer. From Durango shenanigans, backpacking to alpine lakes that sit at 12k feet above Silverton, hidden hot springs outside Aspen and treks to remote huts outside Leadville. I’ve thrown this bag down hill sides as I scrabbled across sketchy ridges. I’ve stuffed it with everything minus my dogs and my kitchen sink. I sometimes forget that I even had it on and for that I’m so grateful for finding ULA. The S curve fit for women is a game changer. Although they don’t make gender specific bags, they still thought of us gals as they designed this bag. I’ve only seen one other woman on the trails and it was of course a bad ass woman from NM hiking with her doggo across the San Juan wilderness. Not sure how else to sing the praises of this bag and this company. All I can say is during COVID the outdoors have been a gift for my friends and I. as we process the heaviness of this world. The one thing that remains a constant is the gift from mother nature to explore her wild places and the ability to be outside with friends. So thanks Chris and ULA for making bad ass bags. See you on the trails <3

  3. Ida

    This pack is as amazing as advertised. I was skeptical of an ultralight pack being as comfortable as my super padded heavier ones. I’ve tried 4 other packs from major brands and the Circuit beats them hands down. I just hiked 25 miles over a weekend with about 28 lbs and no pain, no sore shoulders, no hip chafing, no boob chafing. I wore a tank top the entire time. With all my other packs, there’s always some evidence of the weight carried but not this time. I don’t know what magic went it making this design, but the accolades are well deserved.

  4. Douglas Brockmeyer (verified owner)

    Wore this pack right out of the box for the Southern Sierra High Route. Perfect pack for the demands that trip has to offer. Stable and comfortable. One additional feature is that if you need to carry a second ULA pack on top of this one, like I did, it is simple to figure out a good buckling system that gives you a stable load. Awesome pack, I just wish the internal storage pockets were a little more user friendly to accommodate internal organization.

  5. Samantha Lee

    I love my circuit. The hip belt pockets are at the perfect location. The side pockets are big enough to hold lots of gear. The outside mesh is great for storing my lunch and rain coat. I went with the ability to carry a slightly heavier load due to carry dog food. I always say picking a pack is like picking a best friend and my circuit is an amazing friend! Highly recommend.

  6. cody

    As a long time backpacker I entered the world of ULA in 2015 when I wanted a more lightweight pack for the PCT. I absolutely LOVE my circuit and have been nothing but impressed with it’s durability, function, and look. Having done an entire thru-hike and multiple section hikes the pack is still trucking. I have had to replace a couple buckles here and there and sent it in once for some stitching repair but have felt like that has been totally manageable and expected with the wear and tear I have put on this pack. I have always been impressed with the customer service of ULA and the quality of their repairs. Chris and company has always gone above and beyond which is appreciated. If you want a quality product that completely is worth the price tag you will not be disappointed with the circuit. Love all the new customization options they now have as well! I almost want to order a new pack just to be able to design it w/ all the new colors!

  7. Wayne (verified owner)

    After a couple of trips, I can finally rate this pack as excellent. My previous pack was a Deuter, which was a great, bomb-proof pack, but it weighed almost 5lbs. The Circuit checked most of the boxes for me- comfortable, lightweight, and rugged. There are lighter packs out there, but they are fragile and/or cost twice as much as the Circuit.

    Prior to my purchase and after my purchase, I had some sizing questions and issues, and the owner was great. Quick replies to multiple emails, helping me out with all of my questions and making sure the pack fit properly. Another great thing about the company, is all the bags are sewn in the U.S. It’s a small thing, but it’s nice knowing your purchase was made by workers in the U.S. getting a fair wage and not at an overseas factory where labor laws and fair wages don’t exist.

    The only downside to the bag, and this is true for most bags not named Deuter, Gregory, REI and Osprey, is that I couldn’t try the bag on prior to purchase. I was a little apprehensive about buying a pack this way, but once again the customer service was top-notch and made all the difference.

  8. BJ Ryder

    Been section hiking the Vt Long Trail for years with some big clunky pack with a million pockets and zippers that jam… no more! This thing is a dream on day 1 – it hugs your body and I barely feel it with 25lbs and a bear can full of food on top. I am an REI member, but THIS IS A MUST – there’s truly no other pack like this one. From material selection to loading design, its flawless. I wish you made a golf bag that carried like this!

  9. Rik Fritz (verified owner)

    Just did a section hike of the AZT with my new Circuit and I am very pleased with the comfort and design of it. I have owned many packs over the years from the bigger name companies but always felt that they had too many features (weight) and didn’t quite fit me right. In my quest to lighten my load, I considered some of the more exotic materials but durability is a high priority for me. The Circuit strikes a perfect balance between being
    lightweight and durable and is so comfortable that it feels like an extension of my body. I love it! I’ll be ordering another one for my wife soon. Thanks to Chris and the team at ULA for all your efforts to provide such a great line up of packs, See you on the trail!

  10. Cynthia Brown (verified owner)

    I love my new backpack, the Circuit! It was such a big upgrade, I originally had a really heavy and cheaply made backpack that really hurt my back when I was on the trail. I got to test it out recently on a trail that is 3.5 miles +2000′ elevation, it handled nice uphill. The Circuit has many great features. It just fits really well, and sits perfect on my back. The straps and adjusters are right where they need to be. Easy to adjust and get all buckled in. The other reason I bought this pack was because it has a simple design , not a lot to it, it’s just what you need in the woods. Can’t wait to hit the trail again with this pack ! =D

  11. Steven Aaron (verified owner)

    I was having a really hard time deciding between sizes I am right on the line between medium and large. I called the number and was amazed Chris answered he helped me out sent out both sizes and went over photos to make sure I was getting the right fit. It’s amazing when you actually get great customer service, sometimes you forget it exists. Thanks!

  12. Kirsten

    I bought my Circuit in 2017, for my thru of Te Araroa in NZ, and 3000+km later it’s still going strong! I’m a five foot tall woman with an unusually short torso and a slight scoliosis, and the kids’s size harness with S-straps fits perfectly and gives me a great carry. I’ve used my Circuit for stretches of up to 10 days – you can really cram a lot in without affecting comfort.

    I’ve been really impressed with the durability of this pack, as well. I do quite a bit of off-track in Australia that involves some scrub bashing and butt sliding and the fabric has proved highly resistant to abrasion and the hardwear all remains intact despite the pack being scraped, dragged and dropped!

    It was a gamble to order this pack online from the USA without a chance to try it on, but I’ve never second-guessed once it arrived. Bomb pack – it’s a favourite on all the hiker surveys for good reason. Thanks Chris, for making such fantastic gear!

  13. Daniel Matthews

    This is an amazing pack, I have used it in many different circumstances and it has held up and performed every time. As a 16 year old, I often have a hard time with the sizing, but that was not the case here. It was excellent on couple hundred mile trips as well as in the snow and on shorter trips. The customer service was flawless and I have nothing bad to say about the pack. Thank you ULA!!!

  14. Troy H. (verified owner)

    Took my new Circuit out for a weekend test. It carried my 25 lbs well. The hipbelt pockets were big enough for my snacks, sunscreen, purell, etc. This is the first roll-down top pack I’ve owned. It worked well in an all-day rain. I protected the contents in a dry bag and let the pack get wet. It didn’t soak up or hold water. The shoulder straps and hipbelt were comfortable. I really liked the water bottle bungees on the shoulder strap. I was also able to access my smartwater bottles in the side pockets without taking the pack off. I have a 21.5 in back and 36 in pants size and the large pack with large hipbelt was a good fit. I carried the pack for 26 miles and didn’t notice it. That’s the highest praise I can give a pack for comfort – I didn’t notice it on my back. Thanks.

  15. Rusty Bethke (verified owner)

    I just received my custom color, X-Pac fabric Circuit, and I am amazed with this pack. You never know how a custom pack will turn out but the quality and fit and finish of this Circuit is second to none. After loading it up and doing a quick 2hr hike the first thing that jumps out at me is the comfort and movement of the hip belt. At 6’0″ 190lbs, athletic build the large pack with S straps fit me perfect. Thank you ULA for making such a great product.

  16. patrick (verified owner)

    I came from a standard gregory baltoro backpack to a hyperlite mountain gear ultra light and then I found ULA. I can’t believe how comfortable the Circuit is and the fit is like in the middle of a HMG and the gregory I had. It’s amazingly comfortable and the quality of the pack is unmatched. I would not hesitate to pull the trigger on this pack, it’s worth every single penny

  17. Sarah

    Amazing, lightweight, durable pack.

    I help coordinate and lead annual high school group week long backpacking trips and the Ohm is my go-to pack.

    Keep in mind that this is for carrying a relatively lightweight gear set up (I’d say max. 28 lbs to be comfortable) but I have easily carried all of my gear (I hike in the Pacific west/wet Coast where we have to be prepared for 30c sunny weather to rain/sleet/hail/snow and -4) plus the school group 1st Aid Kits, emergency lightweight tarps, etc. and it all fits comfortably in my pack.

    Honestly, the only two drawbacks to this pack is that the the top strap isn’t a Y strap (would be more stable for carrying a wet tent or bear can on top) – but not such and issue that it can warrant taking away a star from the review – but even more importantly…. I bought it a couple months before the awesome optional custom colours came available (doh!). Looks like I may need to buy a second ULA Ohm pack in the future.

  18. Mikey

    Bought this pack in 2016 and have hiked over 5000 miles with it on the AT, Colorado Trail, PCT and various other trips. It has carried 35-40 lbs loads comfortably. Awesome pack. Still intact!

  19. Nathan (verified owner)

    I am very happy with my ULA Circuit. The multiple options in hip-belt size and shoulder strap design means its easy to find the right size for you and my pack fits snug and comfortable. I’ve used it on day hikes in Arizona/Utah canyons with no signs of it being scrapped and scuffed by rocks. I’ve hiked 90+ miles in the Cascades with it carrying unto 28lbs with out it being uncomfortable. The hip belt pockets are awesome!! And huge, every time I think I’ve filled them but decide to put another bar or misc item in them it fits no issues. I have yet to fill one completely. The side water bottle pockets can be accessed while the pack is worn and I’ve had two 1-liter platypus bottles in one pocket and two 32oz gatorades in the other (one upside down) and the elastic cinch band works great to keep items in. The back mesh pocket easily fit my rainfly, waterproof jacket, hat, and a pair of empty water bottles on my Cascades hike. I wasn’t sure if I would like not having a top lid with storage but found that with some thoughtful packing of items inside, keeping items I’ll access while hiking in the top of the pack or in one of the other noted external pockets it was easy to adjust to it. I haven’t tried fitting a bear canister inside but the inside is spacious and fit all my gear for an 8-day hike. Another thing I was concerned with this pack is the back panel and it’s lack of ventilation compared to other packs. Yes it sits right on your back, which makes it easier to carry your load in my opinion, and does result in a sweat spot on your back, but I didn’t find it uncomfortable or excessive compared to other packs I’ve used. Overall I am really happy with this pack, would recommend it to anyone and look forward to buying ULA packs in the future.

  20. lichtenbergmark369 (verified owner)

    My wife and I are currently Thru-hiking the Appalachian Trail. This pack is amazing and never lets me down. It is very durable and while I see other packs on trail that look beat up, my circuit looks almost brand new. It handles and distributes weight very well and I have had it loaded up to around 40 lbs. I can not say enough good things about this pack and the quality of ULA. Right now we are 800 miles in and we are upgrading my wife’s pack to an ohm. I will leave another review about this pack when we finish, but I’m sure it will be more of the same. If you are looking for a pack that can handle most anything you throw at it for long section hike or a thru-hike, then this is the pack for you.

  21. Kevin Noel

    I have had this backpack for over 8 years and it has stud up to a lot of backpacking and car camping. I’ve tried several different packs before and returned all of them. This is the only one I stuck with over the years. It’s about time for me to get a new one too.

  22. Matt B (verified owner)

    This is one of the best thru-hiking backpacks out there! It can comfortably carry an ultralight load as it can a conventional load. I have over 350 miles on this pack and it is just amazing. I’m very impressed with how much stuff can fit in the stretchy pocket as well as how the pack can expand or contract depending on your food situation. Highly recommended! Beautiful job!

  23. Emma

    After having taking my Circuit on a few backpacking trips this spring, I am completely in love with it! It is so lightweight and fits absolutely perfectly. No breaking in required, at least for me. Everything is adjustable, and it has perfectly sized/placed pockets. I honestly wouldn’t change anything about it. Completely durable as well– I’ve thrown it around quite a bit throughout traveling, but it has held up perfectly. Chris, the owner was also incredibly helpful with ordering!

  24. Steady

    I carried the original ULA P1 over 10,000 miles. Great pack. I made a few mods along the way and they are similar to features now in the ULA line. With proper tender loving care these lightweight packs are plenty rugged. I finally need to replace the P1 and will be ordering a Circuit.

  25. Derek (verified owner)

    Bought two of these, one for my wife and one for myself. Customer service was awesome on getting us set up with a good fit for both of us. My wife had struggled to find a good fitting pack prior to trying ULA so I was super excited for her to finally find a pack that fit well. We did our first trip with 25 pound pack (her) and 27 pound pack (me) and both agreed that the packs were very comfortable with the weight. At a water fill up I bumped up to 35 pounds for a couple of miles for a dry camp night. The pack still wore well at this weight but I was feeling it some as it was the end of the day and uphill to the site. The large side pockets are great (had a 1.3 L pot in one and water in the other). The mesh pocket in the back has a ton of room where I had my ULA rain kilt, rain coat, toilet kit, sit pad and camp shoes with room for more. We both went with the S straps and are pleased with them. All in all my wife and I are both excited about how the packs performed and look forward to many more great trips with them!

  26. Kelsey M

    Fantastic pack. I’ve had it 7 years, used heavily on multiple hiking/camping trips, as well as international trips (checked as baggage). No issues, no complaints.. It’s lightweight, comfortable, perfect size for all my gear, and the design is well thought out. I like how this pack fits – close to my body, very compact, comfortable, and stable feeling. My favorite pack hands down.

  27. Nolan Jordan

    This pack is amazing! Took it on a one week trip in Georgia and has no issues whatsoever. The customer service is the best. Only thing I would change is that the horizontal strap on the side was a little lower to strap a taller water bottle on the side, but I’ll bring a water bladder next time. Everything else is fantastic!.

    • Chris McMaster (verified owner)

      Nolan, there is a cinch cord with a barrel lock on the top of the pockets to secure bottles, etc/ Chris

  28. Chris Dillman (verified owner)

    Really dig the Circuit. Have only backpacked once, but that once was over the Pacific Crest Trail from 4/26/18 to 9/17/18.. I started with a GG Mariposa (which was slightly lighter), however it was torn to shreds after it fell from the back of a pickup during a hitch. My wife sent me my Circuit in Chester, CA and it was perfect. Shame on me for not starting with it. A few thoughts; 1) Hip belt and zipper pockets: Top notch. The clasp on my Mariposa had broken within the first 600 miles. The clasp on the Circuit was much more robust, and survived the abuse of Northern CA, Oregon, and Washington. Additionally, the pockets were easily accessible and the belt itself was very comfortable. 2) Elastic pocket on the back: Perfecto for my tent, ground sheet, TP, & trash bag. 3) Top straps to close: Flawless. 4) Chris’ help in selecting the proper size: Spot on. He picked up my call on my first try, suggested I send him a picture, and in short order, I was back in the game.

    I did remove the metal internal frame that ran down the spine. It didn’t seem to add any value, and added a bit of weight. Will likely purchase a smaller ULA for my shorter day hikes.

    Chris McMaster, thank you for your support, and for making a super duper pack!!

  29. William Brenner (verified owner)

    I have only carried this pack for around 35o km, a very rough estimate could be lots more or slightly less. Regardless it was exactly what I was looking for in a pack, it is very comfortable for carrying 30 lbs or less, when not gaining or loosing elevation I really like the thumb straps, The big stretchy pocket is amazing, I can store lots of essentials and snacks in the hipbelt pockets, and the most important for me, it is very easy to usethat waterbottle pockets while wearing the pack. The Cordura nylon is very durable which is important to me, I am rough on gear, and is water resistant for a long time but does wet out. The features, weight and price led me to this pack and I am very glad it was so, I couldn’t recommend it more!

  30. alan ybarra

    I’ve been using this pack since they first put on the market. It’s been all over the World in all types of conditions and it’s still going strong. I’ve been a Backpacker since about 1980 and had all kinds of packs Gregory osprey Terra Nova and others but this one is my all-time favorite pack for many reasons. The huge side pockets are great it can hold any size canteen or if you’re going with your wife or girlfriend you can even throw a bottle of wine in there very easily. Is very versatile, gerbil, light, and comfortable. I use my pack on a weekly basis and put about anywhere from 20 to 60 miles a weekend on my pack and I have no complaints with this one. I have since given away or sold all my other backpacks with the exception of my original golite Jam pack. And that’s because they are no longer in business and I keep it for sentimental reasons. I have a lot of memories with that backpack as well as my circuit. I would highly recommend it

  31. Lance

    I bought the Circuit about 18 months ago and wanted to use it several times before writing a review. I could not be happier! I was coming from a more traditional (i.e., 4+ lbs heavier!) pack and spent significant time researching “ultralight” packs before deciding on the Circuit. I’ve used it twice on long sections on the JMT, most recently with my wife when I loaded-up the Circuit with more than usual (2+ person tent, fullsize bearcan, etc.) and it took the load easily. I love the adjustability and find I can always get the hipbelt to snug appropriately and take the load; its then easy to adjust the shoulder straps and lifters to get a comfortable fit every time. I like that the pack can cinch down and fit comfortably, no energy-sapping wiggle or wobble. The hip pockets are easily accessed, and the shoulder strap water bottle holders are super convenient. I’ve used this pack on numerous overnights as a scout leader and it has really held-up. The mesh pocket is fantastic, amazing how much stuff can get crammed in there. Could not be happier with my purchase!

  32. scott imus

    i have used many different kinds of packs in the last 50 years working and hiking in the outdoors. There have been day packs, work packs, ski packs, overnight packs, and long trip packs. Since I purchased a ULA Circuit, none of the other packs gets used. The Circuit works for everything. It is 68 liters and 41 ounces. It can handle 35 pounds or so. It weighs less than some of my day packs. It is more comfortable than the big packs. If you are in the outdoors a lot, do yourself a favor and buy a ULA pack.

  33. Susan Abbott

    I love my Circuit pack! I walked the 550 mile Camino de Santiago with it, and it performed perfectly. I had tried many packs before my trip, and this one was by far the most comfortable. The weight sits on my hips, not my shoulders, so it’s never tiring. In fact, wearing it feels like a hug. I carried from 14-20 lbs in it, and found all the outside pockets perfect for organizing my gear. The big waist belt pockets are especially useful, as is the ability to carry water bottles on the front of the pack. I only saw one other person on my trek with a Circuit, and we agreed that our packs were the best kept equipment secret on the Camino. Thank you for designing and making this great product.

  34. Josh

    I used this pack on my PCT thru hike with a ~12 lb base weight. Everything fit with room to spare including a bear can. 2600 miles later this pack still looks new. The pack was comfortable with loads up to ~30 lbs and water bottles were easy to retrieve from the side pockets. Hipbelt pockets are big enough to fit a phone (Galaxy 8+). I would recommend this pack for any backpacking trip. I’m 6′, 150 lbs and used a medium torso with a small belt.

  35. firefighteremt65 (verified owner)

    This backpack is beautiful as it is functional. The customer service is top notch I love this pack so much!

  36. Michael Smith

    Purchased a ULA Circuit last fall. I’ve used it on three different 3 day/2 night trips and one 7 day/6night trip. It is a great pack. Well made, comfortable, very adjustable, and you can remove features you don’t plan to use (bladder sleeve, key/wallet pouch, hand loops, etc). The side pockets are large with adjustable compression, and the hipbelt pockets are awsome… great capacity and easy to open and close. Thanks for a great lightweight pack that is made to last!

  37. Tim C (verified owner)

    Excellent pack. Waited to review until I had used a couple times, including at Isle Royale National Park. Rides extremely well, especially with 20-25 pounds total weight – moves with the body and keeps they weight close in so you’re very stable. Excellent assistance with fit and service from the ULA crew (required a send back to correct the size which was handled perfectly.

  38. Chris (verified owner)

    Just wanted to give a huge shout out to the wonderful people over at ULA Equipment. They did an outstanding job on the Circuit Pack. I ordered it needing it in a hurry for a backpacking trip in the Arkansas Mountains and they rushed it too me just in time for my trip. The Circuit pack has a ton of room enough for my 4 day trip. Thank You guys so much and thanks you Chris over there. Great Company and Outstanding Customer Service.



  39. Cris Lewis

    What a fantastic pack! I packed 20 lbs into a 4-day trip into Henry Coe State Park, which has lots of elevation change. The pack is super comfortable, even during multiple ventures off trail and in steep off-trail moves. It felt like an extension of my body rather than a heavy, bulky packs. Very well made and designed. At 5’5, 120, the s fit very well. Also, the best part: no hip bruising or pain even after 4 days, which I always experienced on my old pack after 1 day! Can’t wait to take it out on longer trips. I too wish I could strap something to the bottom, but there is overall plenty of storage. Also great customer service from the Down Works store in Santa Cruz where I bought it. Thanks for a great pack!

  40. Caitlin “LL” Olson

    I took the ULA Circuit on my PCT hike, and I was thoroughly satisfied. My gear fit nicely (heavy on first few days in the Sierra though), I LOVED how big the hipbelt pockets were, and the water bottle holders on the front straps are a lifesaver for an inflexible person like myself. This is a great pack. Do yourself and get a ULA Circuit.

    I’ll also note that one of the ice axe/pole loop plastic parts shattered when I dropped my pack, and the ULA team quickly sent me a replacement part after I emailed their support. A+ customer service.

  41. James (verified owner)

    I recently purchased a couple ULA Circuit backpacks for my teenage boys (black, and woodland camo). I knew I needed something that’s durable and lightweight. After receiving the packs, we loaded them up with 20lb of gear. Thankfully the packs fit great, look good, and the material and construction feel like they’ll last for many years. The only negatives I could find would be nitpicks, such as wanting a smaller logo, or the pack not being able to stand on it’s own. What is a negative aspect to one person could be a positive to another. It’s great that many extra items can be removed (with the exception of the hip belt pockets). It’s amazing how long the Circuit has been around, largely unchanged.

  42. James (verified owner)

    I have a rather long torso (21.5), almost 5.11 in height, and weigh about 180 lb. had some trouble figuring out which size to go for. long story short, went with the medium at first, but had to replace with a large at the end. but it was all worth the hassle. i picked this pack specially to carry not only light load, but also able to handle 35+/-
    lb loads in case when i need it. couldn’t be happier! great pack and great customer service! will buy again! thank you chris!

  43. Patricia Gatewood-Adams

    I love my Circuit! As a tall and large woman, finding a pack that fits well and feels right is a particular challenge. The dual adjusting options on the hip belt made this the perfect pack for my odd size frame. The bonus…I can just get a new belt when I need a smaller size! I opted for the s-curve shoulder straps as well, which made it even better for me. The pack is a wonderfully simple design with the perfect number of bells and whistles to keep water handy, keep everything secure, and keep the packing sitting just right. I upgraded from a cheap starter pack to the Circuit, and I’m so glad I did! I hardly felt like I was wearing a pack, and was the envy of my hiking group. (They’re buying Circuits before our summer hike 🙂 ) Thanks ULA!

  44. Erin Miller

    I love my Circuit – it is comfortable, durable and light-weight. The customer service alone worth 5 stars!

  45. Jennifer Rolfe-Maloney

    Absolutely Perfect!

    After researching new packs for weeks and wanting something lighter than my current set up that will lay me on a Thru Hike without compromising the integrity of the pack or the comfort of my body, I decided to take the majority of people’s advice and tryt the Circuit. I was apprehensive at first buying online without trying it on and feeling it out firsthand, especially since the only pack I had ever found to fit properly was my Osprey Aura, everything else has been to large in the shoulders & Getting this today & loading up every ounce of gear I own felt so light and natural and actually fit well inside my Circuit. The fully adjustable straps, and load maximizes a perfect fit, especially for a taller/petite woman that was important. I also had asked for gear straps to be sewn in the bottom to allow me to maximize internal space, and the customer service I received was beyond exceptional. I will highly recommend to anyone that this pack stands a cut above the rest.

  46. David

    Unrivaled durability and comfort

    My ULA Circuit is an amazing piece of gear. It’s performed in freezing rain and snow along the spine of the Great Smoky Mountains, hundreds of miles along the Appalachian Trail, deep within Grand Canyon, and has allowed me to comfortably carry 4-6L of H20 when needed. Once while hiking the Appalachian Trail, I stopped to rest and put my pack on top of a large boulder. Little did I know there was a GIANT yellow jacket nest under it! A minute later I was running down the trail trying to escape a swarm bigger than any I had ever seen before. The pack was covered with bees. I grabbed a dead limb about 12ft long and managed to fish the pack off the rock and drag it about 30ft down the trail mesh side down. Not a scratch and the pack still looks new a few hundred miles later. I would not want to experience this with a Dyneema Cuben Fiber pack, and you never know what the trail is going to throw at you. Bombproof!

  47. Josh Bradshaw

    Ultralight yet bombproof

    This year on the PCT (2017) is a very difficult one because of the extreme snow conditions. Leaving Kennedy Meadows I had to carry crampons, an ice axe, a bear can, warm winter layers, and eleven days of food. I was able to fit all of this into my circuit, and carrying it was actually fairly comfortable.

    Two days into my Sierra snow trek I set my pack down and to my horror it slid off a cliff. The pack took a fall that would kill a person, and it cracked my bear cannister. The pack itself and all of the other gear inside it was unscathed, it survived the drop without even a single stitch tearing, and the stays were intact and unbent.

    I was humiliated to make such a dumb mistake, but the durability of my ULA pack was the reason I was able to carry on eight more days instead of having to bail.

  48. Daniel Phillips

    Comfort and convienience

    I couldn’t be happier with my new Circuit.The pack was very comfortable and adjustable right out of the box. The layout is perfect. The Circuit is well thought out. My initial impression during the first miles was that it didn’t require a break in. It fits great and feels much lighter than my old pack even when loaded with my usual 28 lbs. I was most impressed with the hip belt design. I can snug the upper of the four belt sections to angle the belt which keeps it on my hips. My old pack kept putting my upper glutes to sleep because it kept sliding down my waist. The belt pockets are fantastic. Easy to access and big! I really like the large pack pockets with the adjustable shock cord draw openings. Nothing falls out. The expanding pouch on the front will allow a ton of gear even after the main pack is as tight as a tick.
    Thanks ULA.

  49. Mark Jose

    Almost perfect

    The fit is great and it carries a ton of stuff. Only a couple of critiques. Would like a larger waist buckle, a way to strap stuff to the bottom, and I don’t love the way the load lifters attatch to just fabric and nothing structurally.

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