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  • Patagonia - Nine Trails 15L Backpack -
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  • Patagonia - Nine Trails 15L Backpack -

Patagonia Nine Trails 15L Backpack

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14 Reviews


A low-profile day pack made to go fast.

Designed for trail running and fast hiking, the Patagonia Nine Trails Backpack fits like a vest but has the storage capacity of a day pack. The Air flow mesh vest promotes breathability and sits close against the body so the pack doesn't swing excessively or throw you off balance while you're running. The pack consists of a hydration compatible design along with a folding top load and zippered main compartment. A DWR treated nylon ripstop fabric keeps your valuables dry when they're in the pack, while two front pockets are a great place to stash energy gels, snacks, and your phone.

  • Air flow mesh vest-style shoulder straps
  • Foam back panel with mono mesh
  • Folding top load with zippered main compartment
  • Weather-resistant nylon ripstop fabric
  • Hydration compatible
  • Two front pockets (one zippered)
  • Integrated compression straps
  • Item #PAT00P5

Tech Specs

100% ripstop nylon (100D face / 210D bottom), polyurethane coating, DWR treatment
15L (915cu in)
foam back panel
Shoulder Straps
Air Flow-mesh
Waist Belt
Hydration Compatible
1 lid security, 2 shoulder strap, 1 main organizer
Claimed Weight
10.8 oz
Recommended Use
hiking, trail running
Manufacturer Warranty

Tech Specs

  • Reviews
  • Q & A

What do you think about this product?

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Awesome design!

  • Familiarity: I've put it through the wringer

This pack is super adjustable which allows for it to stay in place and not bounce around on long runs. Enough room for an 1.5 liter bladder, some snacks and an extra layer. Would definitely recommend.

Love it!

  • Familiarity: I've used it several times

Just bought this pack in addition to my smaller Patagonia hydration pack. This is an excellent mountain bike, trail running, or day hike pack. It is just the right size. The only downside is that in comparison to the 8l pack there is no clip for the hydration hose. This pack would be a easy 5 stars with the addition of that little clip!


  • Familiarity: I gave it as a gift but have feedback to share

I purchased this pack as a Christmas gift, however I may need to purchase one for myself as well. I was looking for a simple and light weight pack that could be used on the ski slopes for water, extra layers and snacks, but also hiking trails in the summer. I had not seen the pack in person prior to the purchase however I love it. Light weight and simple design with fun colors. This pack is pretty simple overall, however sometimes you don't need the all of the bells and whistles. Well designed and well constructed. Worth a look if you are in the market for a pack like this.

Uncomfortable fit for women

  • Familiarity: I returned this product before using it

Patagonia makes great bags and this one is a perfect size for longer runs and is nicely lightweight - but definitely not designed with women in mind!! You can't adjust the chest straps up/down and as they are, they cut straight across my bust and are extremely uncomfortable. Sadly had to return!

Not designed for a Woman

  • Familiarity: I returned this product before using it

I really wanted to love this pack for longer trail running. I loved pulling out of the bag, loved the zipper, and loved putting it on. Until...I strapped and cinched it on. I don't know how other women do it, but this pack cuts straight across my "bust." How is that supposed to be comfortable for a woman? I am going to have sadly return.

Great for mixed adventures

  • Familiarity: I've used it several times

This pack hits the sweet spot of volume and comfort for mixed adventures that involve running (or commuting). It is large enough to fit a pair of climbing shoes, a chalkbag, tape and brush, a thin Houdini-style jacket, a .5L water bottle, snacks, sunscreen, sunglasses case, extra socks, and other misc. accessories. Even with all that inside, it's pretty comfortable for running (even shirtless). I bought the pack in order to do medium-length runs (up to 10mi) to/from climbing spots (gym, crag, boulders). Perfect for this! I could see it working just fine for longer days focused solely on running/hiking as well.

On a general dorky scale the pack is pretty high, but compared to other running packs it's pretty low. The colors are relatively subdued and there is no ugly writing or design features. I'm 6'1", 155lbs and wear S/M with room to grow in case I get super ripped (or wear layers).

Great Backpack

  • Familiarity: I've put it through the wringer

I primarily use this pack for mountain biking, but have also used it for a few day hikes. It works incredibly well for both. It's enough to fit water, snacks, and a few bike supplies and not feel too big, and even have some room left. I was worried that without a waist strap that it would bobble around, but that is definitely not the case. It stays secure and feels good while wearing it.
The one thing that I did notice was that it is not the best for ventilation on your back. When it's hot outside, my back would get really warm and a bit sweaty. (But what pack doesn't?). I would definitely recommend this for mountain bikers who want a small and light trail pack or for hikers going on a day hike.
I am 5'11" and weigh 150 pounds and the S/M fit me the best

Nine Trails Pack

    My mother in law wanted a new backpack that was in between the size of her other two, and this was just that!
    Plenty of room for the bladder and to carry an extra layer and snacks. Great fit and look!

    Perfect for running

    • Familiarity: I've put it through the wringer

    Well, I started running a little while ago. I had about 6 camelbak/other brand bladders from other packs and was looking for something of the vest type because I hate the idea of holding my water and waist packs. I also wanted somewhere for my phone and food to go when I ran more than a hour and wanted some extra snacks to keep going.

    I love Patagonia so I looked at this initially, but after looking at many alternatives I chose this due to the price. I don;t regret it at all! It fits great and is super light. I love the pockets in front, it fits my 70oz hydration bladder pretty well (not perfect but it works totally fine) and it has extra room in case I leave home when it's cold with a jacket and want to ditch it later on.

    I couldn't be happier.

    Perfect for hydration when running

    • Familiarity: I've used it several times

    I am newish to running. I have run before, but I would have considered a 10k LONG. Now I am running 3-4 times a week, and typically 6 mi would be an average/short run. I really needed something to carry water in as I was starting to really feel out of it without weather for an hour long run.

    I could fit my 2 and 3 liter camelbak in the pack. I just flipped it upside down and squeezed out the air and all was fine, although a 1.5 liter would probably fit perfectly. The pocket on the shoulder is a little small for my iPhone 6s, but if I let the headphone poke out the hole where the zipper would close its fine. Although the it could also just be put in the top pocket.

    The sternum straps don't adjust, which I have seen with more expensive vests, but the pack weights nearly nothing, fit great, doesn't move around hardly at all, and I much prefer it over carrying bottles or having water bottles right on my chest like many vests have.

    All in all, I think it's prefect, and for $80, it's really a good deal too.

    Fun small pack.

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

    I like this pack a lot, the size is great and can store more than you think, however, the only negative that I've found is that my shirt rode up while running with this pack. I may be able to fix this by wearing a longer shirt and packing less in it, but I was trying to test it out with a little bit of weight. Overall looks great and makes a fun hiking pack so you don't bring to much with you, but carry the essentials.

    The ticket to downsize your day.

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

    Fast schmast. This pack does that for sure; the load is part of you, and I put about as much in this pack for its first eleven-mile dry run as one might want to. So yep, run. Go fast as you can. But it's not, for me, about making the 200-miler possible; it's about making the ten to fifteen more fun. When you aren't tempted to add more stuff you don't; the front shoulder strap pockets keep the energy snacks available for the big uphill pulls and the smartphone ready for the glory shots; and I got rainshell insulation gloves warm hat mondo headlamp food (how's a steak and wine lunch sounding to you?) water puro and forty-eight ounces of nicely frozen water in there for a delightful day under a blazing sun. This one was well thought out and a pleasure to drive.