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  • Patagonia - Nine Trails 20L Backpack - Sprouted Green
  • Patagonia - Nine Trails 20L Backpack - Classic Red
  • Patagonia - Nine Trails 20L Backpack - Detail
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Patagonia Nine Trails 20L Backpack

46% Off
from $69.98 $129.00

Item #PAT02G3


Tech Specs

Cordura ripstop, [lining] polyester, PU coating and DWR finish
20L (1220cu in)
Shoulder Straps:
perforated, foam padded
Waist Belt:
U-shaped zipper
1 large front stretch, 2 side stretch, 1 lid zip, 2 waist belt zip, internal stash
Claimed Weight:
1lb 13.6oz
Recommended Use:
Manufacturer Warranty:

Mountain mobility.

Move comfortably and confidently over precarious ridgeline hikes and through technical slot canyons with the Patagonia Nine Trails 20L Backpack. This pack boasts a lightweight, low-bulk design that won't hold you back on tough trails, but still offers the space to carry all the gear you need for a long afternoon trek.

The main compartment offers enough space for a hydration reservoir, food, and an extra layer, and the large stretch exterior pocket keeps your rain shell handy in case you collide with a thunderstorm during your adventure. Lightweight, tough Cordura fabric withstands frequent brushes with branches and rocks, and it's equipped with PU and DWR coatings to keep the contents from getting soaked in a storm. Compression straps manage your load to keep it as compact as possible, and the waist belt and sternum strap provide stability so you don't get thrown off balance when scrambling over boulders. And to keep your back from getting drenched with sweat on the ascent, Patagonia equipped this pack with a mono-mesh back panel that allows excellent airflow and prevents moisture buildup.

  • Made for moving comfortably through the mountains
  • Coated Cordura fabric is light, durable, and water-resistant
  • Large stretch exterior pocket for additional storage
  • Side compression manages load and increases stability
  • Mono-mesh back panel is extremely breathable
  • Padded shoulder harness with sternum strap and waist belt
  • Multiple stash pockets keep small gear organized
  • Reviews
  • Q & A

Perfect Day Pack

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

I used this pack for a couple of spring time adventures and it was perfect for the day trips we took. It had plenty of space and was very comfortable to wear and hike around in. The only thing i didn't care for was the material that the side pockets were made out of. If your out on the trail or trekking up crammed slot canyons this mesh seems a little less durable than the rest of the pack.

Fantastic Day Pack

  • Familiarity: I've put it through the wringer

Perfect for hiking with the dog (I use the large stretchy external pocket for double bagged dog poo). Also mountain biked with it. I carried 3 full Nalgene's in it and it handled the load well without any of the chafing the other reviewer noted, and I'm a dude with a decent neck/traps. Small internal pocket for valuables and lid pocket for quick snack access. My only complaint is that I cannot for the life of me get my Camelbak bladder mouthpiece through the hole meant for this purpose.

So disappointing - like a yoke collar

  • Familiarity: I returned this product before using it

This should be THE pack - great size, perfect pockets (belt stashes, 2 side pockets for our phones/cameras, large stretch pocket for layer & water bottle, inside pocket for wallet & keys, outside "lid" pocket for kid snack, u-shape opening for easy access to all the other misc. you have to take to hike in the weather-mercurial PNW. BUT - the straps are ridiculously close together and chafe your neck! I couldn't believe it when I excitedly put it on, but then I asked the Google and sure enough it's a known problem. I even order the unisex style after ordering the ladies, hoping for wider placement but no, no such luck. Only 2.24 inches between the pack straps at the top. For comparison my Gregory Miwok has 4.5 inches (and way too many mesh pockets to catch on stuff.) The #perfectpack search continues... (Seriously, Patagonia, WTH were you thinking?!)

Do the nine trails packs larger than the 14L versions come with a hydration sleeve and port? I like the 14L pack for mountain biking but sometimes need more volume. The H.A.W.G. is 17L so the 20L nine trails would suit nicely, if it has a hydration sleeve and a port for the hose.

Hey Greg! This bag will come with a sleeve for the Hydration Reservoir and it will have ports on both shoulder straps for your preference. I linked a video for you that will give you more of a visual and an idea of what the pack will offer.


Fits everything I need!

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

Perfect bag for the gym or the crag, holds everything I need (Minus my rope). but perfect for someone on the go.

Goldie Locks pack

  • Familiarity: I've used it several times

This pack is the perfect size for day trip adventures. Hiking with the dogs, adventuring into a new camp spot (not backpacking) keep your running gear for after work, short weekend trip to Cali. All those things you need for those adventures can be stowed in this amazing pack. Really fits a lot of gear without looking bulky at all!


Men's / Unisex
 S / ML / XLOne Size

16 - 19in

(40.6 - 48.3cm)

19 - 22in

(48.3 - 55.9cm)

17 - 21in

(43.2 - 53.3cm)


28 - 36in

(71.1 - 91.4cm)

32 - 42in

(81.3 - 106.7cm)

28 - 40in

(71.1 - 101.6cm)



S / M

L / XL

One Size

15 - 18in

(38.1 - 45.7cm)

18 - 21in

(45.7 - 53.3cm)

14 - 18in

(35.6 - 45.7cm)


26 - 34in

(66 - 86.4cm)

30 - 38in

(76.2 - 96.5cm)

26 - 38in

(66 - 96.5cm)

How to Measure:
-Have a friend locate the bony bump at the base of your neck, where the slope of your shoulder meets your neck. This is your 7th cervical vertebra (C7). Tilt your head forward to locate it more easily. This is the top of your torso length.
-Place your hands on top of your hips bones, with fingers point forward, thumbs in back. This it eh "shelf" on which your pack will rest. The middle of an imaginary line drawn between your thumbs is the bottom of your torso length.
-Using the tape measure, your friend should measure the distance between the C7 and the imaginary line between your thumbs. Be sure you stand up straight when being measured. You know should have your torso length.
Measure around your waist just above your hips.