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  • Patagonia - Ascensionist Daypack 25L - 1525cu in - Drifter Grey
  • Patagonia - Ascensionist Daypack 25L - 1525cu in - Cusco Orange
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  • Patagonia - Ascensionist Daypack 25L - 1525cu in - Drifter Grey
  • Patagonia - Ascensionist Daypack 25L - 1525cu in - Cusco Orange

Patagonia Ascensionist Daypack 25L - 1525cu in


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    15 Reviews


    Climb on.

    The Patagonia 25L Ascensionist Daypack will challenge your climbing cohorts for MVP when tackling Independence Monument in Colorado. With an ergonomic shoulder harness and a removable waist belt, this efficient pack holds everything you need for a day on the rise. Spread the asymmetrical opening wide as you cram ropes, shoes, snacks, and sunscreen into the bag. A drawstring pulls shut with a single hand so you gear doesn't go anywhere. Crafted from robust fabrics, this lofty little number won't whimper if you rub up against a rock. Stick your permit and ID in the zipped lid pocket. Two ice axe spots give your hardware a hands-free ride when you say "good-bye" to Grand Junction and "onward to Ouray."

    • Ergonomic shoulder harness
    • Webbing waist belt, removable
    • Top access, asymmetrical opening, drawcord closure
    • 210D nylon double-ripstop and 400D nylon ripstop body
    • 40D nylon double-ripstop with TPU coating and silicone finish lining
    • 1 zipped lid pocket
    • 2 ice axe spots
    • 4 external daisy chains
    • Item #PAT006Y

    Tech Specs

    210D nylon double ripstop, 400D nylon ripstop, TPU coating, silicone finish
    1525 cu in
    ergonomic shoulder harness
    Waist Belt
    Hydration Compatible
    1 zipped lid
    Ice Axe Carry
    Claimed Weight
    15 oz
    Recommended Use
    climbing, hiking
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Fits all the gear!

    • Familiarity: I've used it once or twice and have initial impressions

    I used this pack on my trip to Yosemite to hike up half dome. I was so amazed by how much stuff I could pack in there! I was able to fit my harness, helmet, jetboil, 1.5 li camelbak, food and extra layers! It sat pretty comfortably on my back . The only thing I wish it had was a set-up for the bladder. I was able to get the hose out of the pack and attach it to the loop on the strap, however I did find myself having to pull and tug at the hose in order to get a drink of water. Other than that, this is an amazing pack!

    Ski Carry Configuration

    My skis are 111 mm in the tail and they barely fit in one of the ice axe loops. I had to put a knot in it so it would stop slipping, you might be able to squeeze something fatter but, doubtful. Be sure to take the top buckle and put it above the toe pieces so it holds them in place relatively vertical.

    Ski Carry Configuration

    Another Favorite

      I started with the 35L version of this bag and loved it so much I got the 25L. It does take some time to get used to how you hang, stuff, and strap things to this pack but, I feel as though I've accomplished more than I ever thought was possible with it.

      I use this as a ski touring pack, and if your skis are skinny you can get a diagonal ski carry. Not easy but, its possible. I had to knot the bottom ice axe loop so the strap didnt slip through the clip and then used the main middle strap to lock the hood of the bag over the bindings and hold it in place. This probably took me 3-5 times to figure out but, they are secure. I do miss a shovel and probe slots but, will accept that to keep the weight down.

      I havent been able to carry all my climbing gear. The rope, rack and helmet are just too much for the 25L and I opt for the 35L. Though it cant take the rack/rope/helmet and personal gear it can "almost" do it which is amazing because it is only 25L. Ive gotten close but, its just too disorganized and looks sloppy.

      I've used it climbing but, I made sure to carry the rack and the rope went with partner. On alpine climbs where things are split up pretty evenly anyway, I always find a way to use this as its so small, and light so really comfortable to climb in. Sometimes I even take the gear loops off the 35L waist belt straps and put them on the 25L so I can use my Camp USA Alp Racing Harness which does not have big easy to use gear loops. This allows me to carry a super light pack and get 2 solid gear loops.

      As a Day Pack its the only way to go. If you don't need to carry a rope/helmet/rack this is a no brainer. Your hikes will be better because this pack is so light and carries the necessities so well. I've never had to think about how to fit a puffy, hard shell, 3L of water, and usually a thermos of coffee for a day hike. .9 Adventure Medical Kit fits perfectly in the top pouch with my Spot Locator and a few extra bars.

      Not a ton of bells and whistles but, extremely thought out and very functional for many different adventures. This line is my favorite pack line!

      If you have any questions please do reach out directly.

      Bill Porreca



      Another Favorite

      A Fantastic Day Pack

      • Familiarity: I've put it through the wringer

      I was in need of a day pack at the end of last year and picked up my Ascensionist 25L to meet that need. It has met that need perfectly. I have used it on multiple hikes, carried all of my mountain biking clothes to and from work in it, and stuffed my hard shell and camera gear in it at a recent Rally Race I attended. This pack hasn't let me down yet and I'm looking forward to putting it under even more hard work this year.

      A Fantastic Day Pack

      Agree to Disagree

      • Familiarity: I've used it several times

      Pros: Lightweight, DWR outer Coating

      Cons: Unique closure impedes rope carry,

      I got this as a fast and light alpine bag for multipitch rock and warm ice climbing days. The bag seems to be of quality construction and the stripped down detail features are nice. I like Patagonia's innovation on the closure system, which is easy to open and close with a hand. Unfortunately the way this closes makes it very difficult to secure a rope with a very solid connection. To secure the rope you must move the tab from the bottom of the bag to the top, but if the bag is not just the precise amount of overstuffed, the rope will flop around needlessly and is a very insecure on a hike/scramble. This is what ruins the bag in my opinion. Try and fit a 70m rope in the bag with you other gear and you'll be out of room.

      The rest of the bag seems great. Lightweight straps for a very low load bag would be a non issue. The foam back doesn't make this the most comfortable bag, but to be expected of this style. It makes a really good day hiking bag.

      Bag would fit it perfectly if the rope carry functioned well. I've since gone to a system with the rope carry in the upper location and giving the rope a full wrap before engaging the locking tab. Works OK for the most part, but isn't as secure as a traditional top lash. The 25L is a full pound lighter than the 35L. Not being silly, just trying to use the minimalist bag to its full potential.

      Great Pack for the Day adventures

        I got this pack to use mostly for hiking (with a little bit of climbing when I needed it) and it is undoubtedly my favorite day pack I have ever owned. I usually pack with me a DSLR camera, a tripod, jacket, food, and other odds and ends and it and it still feels comfortable. I have used it in the rain a few times and all of my gear comes out dry. The only thing that I would have to say otherwise about this pack it that it gets really hot on your back when it's hot outside. I have gone on hikes in 95 degree weather and I don't normally sweat too much, but where the pack was on my back and shoulders, it was soaked. Sure you could say that for any other pack, this one just feels like it makes it even more hot than most packs I have used. Overall I really love this day pack and I very happy with my purchase.

        Awesome alpine pack

        • Familiarity: I've used it several times

        I love this backpack. i´ve used it in several climbs in patagonia Argentina.
        Pros: super confortable during the climb, stuffed to the max or not; great size, i have even used it on multi day climbs, bringing only the essentials; awesome clousure system. super lightweight, and being small, makes you pack smart and have a light backpak all around.
        cons: it´s not the most confortable pack during the approaches if its fully loadades, you have to carefully place the softer things next to your back (don´t want to walk with a cam stabing you back); it´s not the most durable either. for it´s weight it is extremly durable, the thing is that as it is super light you can´t expect it to live that much. (a recomendation, try not to haul it).
        bottom line, GREAT backpack, climbing oriented, would recomend it to everybody

        The perfect pack for the right situation

        • Familiarity: I've put it through the wringer

        The Patagonia Ascensionist Daypack 25L is unquestionably one of my favorite packs of any size. After backpacking across Europe with it as a daypack (it stuffed easily and almost unnoticeably into my larger pack), and climbing a few multi-pitch routes, I have to say that its light weight, tough build, and versatility are outstanding.

        For traveling, it’s a perfect daypack size. I was able to fit a mid-weight rain jacket, Patagonia Nano Puff, rain cover, snacks, water, a digital SLR with a massive lens, a spare prime lens, lens filters, and a few extra odds and ends into it and it hauled it all with ease. The same is true for climbing; it will hold everything you need for a day out climbing on sport, or some reasonable multi-pitch trad (short of a big wall, though it would still make for a great leader’s pack).

        The shoulder straps are surprisingly stout and well padded for such a light pack. I have other summit packs that are roughly the same weight and size, and they almost always seem to have nearly useless straps that make holding anything larger than a jacket nearly unbearable. However, the straps on this pack allowed me to occasionally over pack the 25L when needed and not suffer too much pain. What’s more, I was able to dangle my 8lb+ SLR kit off a single strap with an arca swiss system and it handled it with ease. The pack is incredibly well built for its diminutive size and weight.

        The 25L is simple, and as such it stays out of the way and does only what it needs to. It doesn’t conflict with a helmet, and moves with your body as you climb. The drawstring cover is easy to access (though you may find it usually requires two hands to be efficient). The fabric is tough and resilient against rock, concrete, and light moisture. Being an avid rock climber, I’ve learned to trust the great strength that you can get from thin, modern webbing, so I think the daisy chain loops down the side are the perfect size and location for this kind of ultra light pack. The bottom hip strap is invaluable for keeping the load tight against your body when climbing, and it can carry a little weight when needed.

        All those great things said, there are some things that this pack is not, though most are by design. While the pack is well balanced and the shoulder straps are well cushioned, you will know very quickly when you have over packed. Without your hips to help carry the weight, your shoulders will take a beating very quickly. If you use this pack for light ascents as it was meant, you shouldn’t have a problem. To keep the pack light, Patagonia didn’t add a back panel or any reinforcing. If you place loads poorly (like shoving an SLR in against the back) you will feel it every step of your hike/climb. The material is tough and weather resistant, but since that same material lines the back of the pack, it is also prone to overheating. In 100+ heat and high humidity, this pack was often almost unbearable at times and I had to sling it over one shoulder instead of two (though given that level of heat, any pack would have been uncomfortable). This, however, is an inevitable compromise for simplicity and ruggedness since mesh panels are bulky, heavy, and wear out quickly. Simply put, this pack is happiest in cool to cold, dry temperatures. Since most of my adventures involve mountains, this isn’t too much of a concern for me. Lastly, the top handle is large and easy to grab with gloves on, but when new it is prone hit you in the back of the neck. I solved this by hanging a carabiner on it which I often used for holding my hat. With time, I think it will naturally lay down.

        All things said, the Patagonia Ascensionist Daypack 25L is unquestionably my favorite daypack (of the half dozen I own, and dozens I have researched) and I highly recommend it to anyone looking for a pack this size.

        Multi Use "Sack"

        • Familiarity: I've used it several times

        So after extensive research on small bags, with an emphasis on climbing, I finally broke down and ordered this fancy little pack from Patagonia.
        I really wanted a SIMPLE pack, my other bags have a pocket for everything under the sun, which ultimately weighs a lot and makes it difficult to pack a bag correctly. This bag proves to be the cure for my encumbering issues.
        It is literally a sack, with a small pocket on the cover, two shoulder straps, and an optional waist strap.
        For a 25L sack you can stuff a LOT in here; were talking full set of cams/nuts, 'biners, slings, several water bottles, some snacks, small medkit, an emergency rainshell, and get this... a climbing helmet to top it off!
        By moving the center vertical strap that cinches it all down, up to the top loop, you can even throw a rope on and secure it. Unfortunately, I tend to over pack bags and always forget my climbing shoes... BOOM external daisy-chains, four of them running vertical along the sack.

        I love this thing, I use it for everything; climbing, traveling, biking, hiking, even for school...

        My only gripe is that i wish the daisy-chains and shoulder straps "felt" a little more durable, I trust the stitching entirely (I actually took it on a Multi-pitch route over the weekend to test it out.), I just wish I could physically see that it is stitched enough to withstand a bear attack...

        Ultra-Light, fits more than you'd think

        • Familiarity: I returned this product before using it

        This pack fits a lot of gear + a rope, but the lack of water bottle pockets (not necessarily a bad thing) means you'll either need to lash your agua to the outside or stuff it inside. I planned on using this for a summit pack when leading 5 day backpacking trips for youth groups in the Sawatch/San Juans this summer, but the need to fit an extra water bottle and first aid means I'm going to be returning this and ordering the 35L. I can only hope that the 35L is as compressible and close to as light as this dude though, the only weight on your back is what's inside the pack, and it seemed surprisingly tough - I wouldn't be afraid to pack my crampons or ice screws in there, and I had no fear when test-stuffing it to the max.


        • Familiarity: I've put it through the wringer

        This pack simply delivers. Those who complain about lack of this that or the other are missing the point and need an entirely different product. It's enough for a day of multipitch anything, yet light enough for a quick jaunt up to your favorite alpine lake. If it isn't stuffed, it rides very low profile, yet its easy to bump the strap up the top shelf to accommodate a rope thats lashed over the already full pack. No need for anything else, people complain about it lacking a key chain clip in the pocket, or a hydro sleeve. That all equals weight and bulk. This lacks either of those, amongst so many other "gadgets", and its obviously intended to avoid such common pitfalls of nearly every other pack design out there. What this pack lacks is where the beauty lies, its not a posh, framed behemoth designed to absorb every little sharp doodad that you have. It merely adheres to the age old adage of keep it simple......

        Love this little guy

        • Familiarity: I've put it through the wringer

        Fairly comfy, solid construction. However the lack of hydration bladder compatibility is brining me down. For done in a day pushes in summer, when water is a constant need, I am always having to stop and fish out my platypus water bottles--major pain in the butt. Especially if I am packing a helmet and various other minutia. Other than this quibble, it is really all you could ever need in a day pack--Supper light, hardy, clever lid. Note* the white shows sweat stains

        Love this little bag

        • Familiarity: I've used it several times

        Got this several months ago specifically for to and from the gym for climbing and quick and light day hikes. The daisy chains outside are great and strong, attaching shoes and chalk when rest of bag is full. would like a water bottle pocket on outside on one side. I like the low profile and narrowness so doesn't rub my arms. Shoulder straps are soft and comfortable. Have recommended it to others looking for day hike packs and climbing packs.

        Great little pack

        • Familiarity: I've used it several times

        The small size is of this pack can actually hold a good amount. It's the perfect size for a single day alpine or ice climbing trip. Room enough for a light puffy, small rack, crampons, snacks and water. Compresses pretty well, could be used as a summit pack. Very lightweight. comfy for climbing.

        How small does the 25liter fold? I plan to use it as a summit pack that i can pack in my bigger pack for use on summit day.

        I am looking for a backpack for school, that could double as a backpack for backcountry touring. Would the Ascensionist Daypack 25L be large enough to carry notebooks, or backcountry gear?


        This is a great pack, but I'd have reservations about using it to carry school books. The back padding is very minimal as this is more of a daypack for hiking or an alpine pack for lighter loads.

        You could fit books / binders in there. You can also put in a shovel, probe and extra layers for touring. It'll be able to do what you're asking but I think there might be other options that would be better suited for each category.

        For touring I'd personally want a pack that had the ability to carry my board or skis if I get into the situation of needing to boot pack.

        Shoot me an email anytime you have questions!

        Jared D.

        Expert Gearhead



        Best Answer

        I bought this bag with that exact question in mind. I used it only one day for a school and it was all floppy so I didn't use it again. I did only have a couple of classes so not that many books and what have you, but it is still a really great bag and easy to fit lots of stuff in despite it being only 25L. I've had it for over a year and it's definitely the go to bag.

        Can anyone comment on the long term durability of this pack? I'm looking for a multi-pitch leader pack that I can still pack everything into on a long approach. This seems to fit the bill, but I don't want it to get shredded after the first chimney pitch.

        Best Answer


        This pack was in development for years with the Patagonia design team, and tested extensively for durability. A good friend of mine used the 45L model climbing and traveling all summer and had no problems. If there are any problems with it over the life of the pack Patagonia will cover that under the Iron Clad Guarantee.

        The first time i used mine, i tore several holes in the body and was sorely disappointed since it is a beautiful pack. I was climbing a chomney with it. The holes were pretty large and expose the contents. I would use it for anything except chimneys, it will get ripped.

        Same thing for me...first trip out - Mithral - tore a few holes in it. Design is awesome but I wouldn't use it on chimneys or corners, if your groveling at all. Carries a surprising amount, lid is awesome, but the strap for the lid, while innovative, is concerning. Could see it falling off from bottom loop.