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  • Patagonia - Ascensionist 40L Backpack - Big Sur Blue
  • Patagonia - Ascensionist 40L Backpack - Ink Black

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  • Patagonia - Ascensionist 40L Backpack - Big Sur Blue
  • Patagonia - Ascensionist 40L Backpack - Ink Black

Patagonia Ascensionist 40L Backpack


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    6 Reviews


    A stripped-down pack for day climbs and alpine ascents.

    The Patagonia Ascensionist 40L Pack loves the idea of ice climbing in Ouray, ascending Aconcagua, or hiking for a week through Glacier National Park. The lightweight and totally bomber Cordura fabric is resistant against tearing and abrasion, while the PU coating fends off light moisture or precipitation. A high-density foam back panel not only provides structure, but it can also be removed when you're counting ounces, and the padding on the hip belt is entirely removable for your convenience.

    Keep in mind that this pack only has one point of access, so you'll want to put less-used items in the bottom, but the asymmetrical spindrift collar does have a girthy construction for easy access to gear and easy packing. The lid features a zippered pocket, giving you immediate access to items you'll be using frequently. The ice axe carrying system accommodates a wide variety of ice axe sizes and the daisy chain lash points give you external storage options when you don't want filthy ropes or mud-crusted crampons inside your bag. If you're only out for the day, use the compression straps to minimize bulk and maximize mobility.

    • Tackle peaks far and wide with this lightweight pack
    • Cordura exterior is durable and abrasion-resistant
    • PU coating fends off light moisture
    • Foam back panel is removable for fast-packing
    • Removable padding on hip belt provides a customizable fit
    • Top-loading asymmetrical collar provides easy access to gear
    • Pack is ski and ice axe carry compatible
    • Daisy chains provide additional lash points for gear
    • Item #PAT01PO

    Tech Specs

    210D Cordura, PU coating
    40L (2441cu in)
    Waist Belt
    removable, webbing
    1 zippered lid
    Gear Loops
    yes, daisy chain
    Ice Axe Carry
    yes, ski carry as well
    Claimed Weight
    1lb 15oz
    Recommended Use
    climbing, hiking
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Go To Alpine Pack

    • Familiarity: I've put it through the wringer

    This pack is my go-to for any and all alpine adventures. The lightweight design and the added full length daisy chain allow for so much versatility. I will be heading down to Aconagua soon using this as a summit pack. I've also gotten some Winter overnighters in with just this pack and not having to worry about taking a separate summit pack as this pack is light enough to be that pack as well. I've also gotten many days in touring with it and the ski carry makes it perfect for a quick rappel if needed. You can macgyver a snowboard onto it, but if you use a split, you can simply use the ski carry option too. I haven't had any issue with the suspension system, even when fully packed out. I would definitely recommend this pack as it is not a one use pack, and can serve as a multitool pack for any and all alpine adventures.

    Feel free to reach directly out with any and all questions!

    Great pack

    • Familiarity: I've put it through the wringer

    I have the 35L and use it as a summit pack for Rainier, I wanted a slightly larger pack for Europe and climbing Mont Blanc, this thing was the perfect size for so many hikes and climbs I did for the 6 weeks I was in Europe.

    The straps and belt are very comfortable and I had zero issues with the pack being stuffed to its max.

    I had guys from the UK checking it out while we were in the Midi tunnel coming back from acclimatizing, They were really impressed with the features and the ease of how I was able to cinch it all back together after stowing all my gear back in it.

    Light Pack for Climbing & Skiing

    • Familiarity: I've used it several times

    So far I've only used the bag for getting to sport crags and backcountry skiing. It's super light and offers nice back distribution adjustments. The gear loops on the outside have come in handy when I need the extra room. It holds my skis well and there is plenty of room for rope, helmet, and gear. I wish the brain had more to offer; there is very little volume. It's really just a flap to tie down the pack. Overall, nice design and tough fabric. Definitely not the best option if you're only rock climbing, but I look forward to using it more in Ouray.

    Light Pack for Climbing & Skiing

    perfect pack for alpine climbing

    • Familiarity: I've used it several times

    I used this pack for a 1 month trip to CO including some ice, mixed, and rock climbing, as well as some day hikes up some non-technical peaks. It's a perfect size to fit layers and climbing gear for an day trip in the alpine. It is also a good size for a crag bag for my rock climbing gear. The fabric seems nice and durable, no signs of wear or abrasion after a pretty busy month. I found the gear loops and straps to be convenient and well thought out. (I particularly like the small elastic/metal pieces to lock down ice-axe & ice tools).

    The pack is probably a little bit small for multi-day trips (though you can manage if you strap enough camping gear on the outside for the approach). Also, the lack of external water bottle pockets and very simple design are perfect for climbing, but probably not the most convenient for general hiking and backpacking (though I used this bag on plenty of day hikes, and it worked quite well).

    Picture: getting into some ice on the dreamweaver couloir on Mt Meeker in Rocky Mountain National Park

    perfect pack for alpine climbing

    perfect size, much improved on the past

    • Familiarity: I've put it through the wringer

    I own several ascensionist packs, well pretty much every size, and these new ones are hands down, an improvement in some ways and lack in other ways. The 40L is an ideal size for the technical ski tours or longer alpine objectives, hut tours, or as a guides pack. You can easily get a full rack rope and helmet inside, as well as snow safety equipment if you are using it for technical ski mountaineering. It is lightweight and the new material seems to be more durable than on the previous generation. I do miss the spindrift collar for when you are trying to get as much in it as you can, as it did keep the weather out. Overall, it has been a great pack so far. I have used it extensively for the last several months, for those that have had durability concerns from the last generation. This includes multi day ski tours, overnight alpine trips, and technical ski mountaineering where the skis are on the pack a good share of the time. I can easily fit a probe, shovel, saw, full snow study kit, down jacket, first aid kit w/emergency tarp, an emergency sled, helmet, 30m rope, gloves, water, food, and other various items needed, all inside the pack with room for more, for a general idea of what it is capable of.

    perfect size, much improved on the past

    Light Is Right

    • Familiarity: I've put it through the wringer

    This is a simple, well thought out pack that has all the features you need and none that you don't. At about half the weight of many competing products, the Ascensionist is an alpinist's best friend, providing dual ice axe loops, well padded straps that don't absorb water, a removable back panel, and a simple closure system with a couple zip pockets to keep track of the random nick nacks.

    Fully packed, the carry system was very comfortable, evenly distributing the weight and keeping things close to the body. I found that the waist belt would loosen a bit while touring, probably due to having a smaller waist and being pretty maxed out on the adjustment. I have a good friend who also uses this bag that hasn't experienced the same issue, so it may just come down to body type.

    I missed the extra capacity of the previous model as well as the spindrift collar, which allowed for some over-stuffing on bigger trips out. That said, with the dual daisy chains running the length of the pack there are tons of options for strapping down gear and tailoring it to your needs.

    All in all, a solid choice for a go-to alpine pack. The 40L capacity is dead on for a short multi-day tour or a bigger alpine objective. The pack never feels bulky and held up well to crampon points and ski edges. If you're trying to keep things fast and light you'd be hard-pressed to find a better bag for the job.

    Unanswered Question

    Will they be making a new version of the 45 liter variant? Or is this it's replacement?