Best Backpack For Appalachian Trail
Best Backpack For Appalachian Trail, ranked from aggregated owner ratings and reviews, not first-hand testing. Real pros, cons, and who each pick is best for.
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In plain English
The Appalachian Trail, often called the AT, runs through the mountains of the eastern United States, from Georgia to Maine. People who walk the whole thing in one go, called thru-hikers, usually spend several months on it, carrying everything they need to sleep and eat outdoors, and stopping in towns every few days to buy more food.
That means an AT pack is not a small daypack. It has to hold a shelter, a sleeping bag, a stove, clothes and several days of food, and it has to be comfortable enough to wear all day for months. The trail is steep, rocky and often wet, so a pack that sits steadily on your hips and handles rain matters a lot.
Many hikers start with a slightly bigger pack for chilly spring weather and switch to a smaller one later. Fit comes first: measure your back length and try the pack with weight inside before you commit.
Our Top 3 Picks
Quick Comparison
| Shell | Extras | Buy | ||||
|---|---|---|---|---|---|---|
| 1 | Osprey Exos 58L Men's Ultralight Backpacking BackpackTop Overall Pick | 58 L | 2.8 lb | — | Hydration | View |
Choosing a backpack for the Appalachian Trail means balancing enough capacity for an early-season food carry and bulky warm layers against a pack light enough to carry comfortably across nearly 2,200 miles of steep, rocky, root-laced trail.
What size pack does the AT need?
Most AT thru-hikers start with a 55- to 65-liter pack to fit early-season insulation, a stove and fuel, and several days of food through Georgia's frequent but still real resupply gaps, then move to a 45- to 55-liter pack once cold-weather gear gets mailed home and the kit settles into a summer-weight setup.
That downsizing pattern is common enough that many hikers plan for it from the start, buying or renting a larger pack for the first few hundred miles and switching once their kit is dialed in. A pack with some adjustability in its torso length or hipbelt sizing handles that transition better than a fixed-size pack bought for only one season's kit.
How should climate shape an AT pack choice?
The AT's humid, frequently wet climate favors a pack with fast-drying body fabric, an included rain cover or waterproof liner, and a back panel that ventilates well on steep, sustained climbs, since sustained rain and high humidity are far more common obstacles on the AT than on the drier Pacific Crest Trail.
Resupply towns sit close together for most of the AT, and food carries of three to five days cover the majority of the route. The one major exception is Maine's 100-Mile Wilderness, the trail's longest stretch without town or road-accessible resupply, where hikers often carry four to eight days of food depending on pace.
Frameless or framed for the AT?
A single-stay or full internal-frame pack generally suits the AT better than a frameless design, since the trail's steep, uneven, root-and-rock tread rewards a stable, well-supported carry more than it rewards raw weight savings, even though many AT hikers still keep base weight under 20 pounds.
Hiker profiles on the AT vary enough that no single pack size fits everyone:
- Early-season starters generally need 55 to 65 liters to fit heavier insulation and a full stove setup.
- Ultralight-focused hikers with a sub-15-pound base weight can often run 40 to 50 liters for the whole trail.
- Flip-flop and section hikers restarting mid-trail in warmer months typically need only 45 to 55 liters.
- Hikers who carry extra comfort items, like camp shoes or a larger cook kit, should budget closer to 60 liters even in summer.
When should you downsize an AT pack?
Most AT hikers reassess pack size at an early shakedown stop, commonly Mountain Crossings at Neel Gap around mile 30, once they've identified unused gear to mail home and settled into a lighter, warmer-weather kit for the bulk of the trail.
A hipbelt fitted to a properly measured torso, taken from the C7 vertebra to the iliac crest, matters as much at this stage as raw liters, since a correctly sized hipbelt carries, by a common rule of thumb, roughly 80% of total pack weight and keeps the AT's steep climbs manageable at any capacity.
Full Ranking, Reviewed
Best for Backpacks for the Appalachian Trail
- 58 L capacity
- 2.8 lb empty
- Hydration-ready
- Hipbelt Pockets
- Set up to carry a reservoir for hands-free sipping
- Adjustable torso dials the fit to your back length
- At 58 L it is more pack — and more weight — than a day hiker needs; it earns its keep on overnight and multi-day loads.
Verdict: This 58 L backpacking pack pairs room for a bladder with real hip-belt support, making it our overall pick for Backpacks for the Appalachian Trail.
What AT hikers actually carry, and the 20% rule
A common guideline says a loaded backpacking pack should stay under about 20% of body weight. It is a hiking-community rule of thumb rather than a finding from research, and the evidence around it is mixed. A study of Appalachian Trail long-distance backpackers found they carried packs averaging 19.6 kg for men and 17.3 kg for women, or 25.0% and 27.9% of body weight, above the popular 20% guideline.1 Deuter, a pack maker, says people can carry a maximum of 20 to 25% of their body weight.2 A research review suggests adult loads in hiking and military settings should generally not exceed 40% of body mass,3 while a 2026 study of long-distance hikers found plantar pressure rose in a clear, load-dependent way once packs passed about 10% of body weight.4
The practical takeaway: lower is better for feet and comfort, and every day's load varies. The heaviest days come right after resupply with full food bags, and that peak, not an average, is what the pack's frame and hip belt must handle.
How much the hip belt carries is disputed
The page says a correctly sized hip belt carries roughly 80% of total pack weight. That figure is widely repeated but not settled. The Washington Trails Association says a hip belt transfers most of the weight, around 80%, to the hips,5 and Alpkit gives 60 to 80%.6 US Army doctrine, however, says that with a pack frame and hip belt, carrying 31 to 90 pound loads, about 30% of the load is on the hips and lower back and 70% on the shoulders.7
What sources agree on is direction: a lab study found the hips tolerate pack pressure significantly better than the shoulders,8 so a well-fitted hip belt matters on a trail with as much climbing as the AT. Torso measurement from the C7 vertebra to the iliac crest, as the page says, is the standard starting point,9 but Kelty notes it is only a starting point for fit.10
Rain, rocks and roots: what the terrain asks of a pack
The AT's wet climate means rain protection is a system, not a feature. Deuter says even waterproof fabric lets moisture through zippers and seams in sustained downpours,11 and REI says waterproof stuff sacks inside the pack can work better than a rain cover in wind.12 Staying dry is also a safety point: CDC says hypothermia can develop above 40°F when a person is chilled by rain or sweat, and it lists hikers among the people at higher risk.13
Load placement is worth thinking about on rough tread. Most packing advice puts heavy items mid-height against the spine,14 but a military review notes that low or mid-back placement may suit uneven terrain, while high placement may be best on even terrain.15 On the AT's rocky, root-laced descents, a slightly lower, tighter load can feel more stable. Poles help there too: they reduced knee forces by 12 to 25% on a steep downhill in a lab study.16
Frequently Asked Questions
What size pack do most Appalachian Trail hikers start with?
Most northbound AT hikers start with a 55- to 65-liter pack to fit early-season insulation and a stove setup, then downsize to 45-55 liters after an early shakedown stop, commonly Mountain Crossings at Neel Gap, once cold-weather gear gets mailed home.
What is the longest food carry on the Appalachian Trail?
Maine's 100-Mile Wilderness is the AT's longest stretch without a town or road-accessible resupply. Hikers typically carry four to eight days of food through it depending on pace, compared with the three to five days that cover most of the rest of the trail.
Do AT hikers need a framed or frameless pack?
A single-stay or full internal-frame pack generally suits the AT better than a frameless design. The trail's steep, root-and-rock, constantly up-and-down tread rewards a stable, well-supported carry over raw weight savings, even though many AT thru-hikers still keep total base weight under 20 pounds.
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