Gear

How to Pick a Backpack for the Trail

A hype-free guide to choosing a trail backpack: matching volume to your trips, getting torso length and hipbelt fit right, and judging features that matter.

A loaded hiking backpack resting on a ridge with mountains in the distance.
Photograph via Unsplash

A backpack is the one piece of gear you wear for every minute of every hike, so it has more power than almost anything else to make a trip pleasant or miserable. The good news is that choosing one comes down to a few honest questions about how you actually hike. Get those right and the marketing features sort themselves out.

Size it for the trips you actually take#

Pack volume is measured in liters, and it is tempting to buy big so you are ready for anything. Resist that. An oversized pack is heavier empty, sags when underfilled, and quietly invites you to carry more than you need. The better approach is to match volume to your typical outing and accept that the rare bigger trip might call for a different pack or some creative strapping.

A rough way to think about volume:

  • Day hikes: a smaller pack holds water, snacks, a layer, and the essentials without bulk.
  • Overnight and weekend trips: a mid-sized pack fits a sleeping bag, shelter, and a couple days of food.
  • Multi-day and expedition trips: a large pack carries bulky cold-weather gear and longer food supplies.

Your packing style shifts these numbers. If you own compact, lightweight gear, you can go smaller for the same trip length. If your sleeping bag and tent are older and bulkier, you need more room. Be honest about the gear you own now, not the ultralight kit you hope to buy later.

Fit is about torso length, not your height#

This is the part most people skip, and it is the part that matters most. A backpack does not fit because it looks the right size. It fits because its frame matches your torso length, which is the distance from the bony bump at the base of your neck down to the level of the top of your hipbones. Two people of the same height can have very different torso lengths, which is exactly why trying a pack on beats reading a size chart.

Many packs come in multiple frame sizes or offer an adjustable back panel that slides to match your torso. Either works. What you are aiming for is a pack where the hipbelt wraps your hips correctly and the shoulder straps wrap over and just past the top of your shoulders without a gap. If the load lifters, the small straps near your collarbones, angle back at roughly forty-five degrees when snug, you are usually in the right range.

Carry weight in the store before you buy. A pack that feels fine empty can reveal its pressure points the moment you load it with twenty or thirty pounds and walk a few laps.

If a shop has weights or sandbags, load the pack to a realistic weight and walk around for several minutes. Bend over, reach up, twist. You are feeling for hot spots, pinching, and whether the weight sits steady or sways.

Let the hipbelt do the heavy lifting#

Here is the single most useful thing to understand about carrying a load: most of the weight should ride on your hips, not your shoulders. Your hips and legs are strong and built for it. Your shoulders and neck are not, and they fatigue fast. A good hipbelt transfers the bulk of the load onto your pelvis, and your shoulder straps mostly just keep the pack snug against your back.

For this to work, the hipbelt has to fit. It should wrap around the top of your hip bones, not your waist, and you should be able to cinch it firmly without it digging in or sliding down. When you tighten it, you should feel the load settle onto your hips and your shoulders relax. If you cannot find that feeling, the belt is the wrong size or shape for you, and no amount of shoulder strap adjustment will fix it.

Frame stiffness plays a supporting role. An internal frame gives the pack enough structure to transfer weight to the hips and to hug your back for stability. Very minimal frameless packs can be lighter and fine for light loads, but they ask more of your packing skill to stay comfortable. For most hikers carrying real weight, some frame is worth the few extra ounces.

Judge features by whether you will use them#

Pack makers love to add pockets, straps, and clever access points, and some of these genuinely help while others just add weight and price. Focus on the few that earn their keep. Hipbelt pockets put snacks and a phone within reach without stopping. A large stretch pocket on the front swallows a wet rain jacket. External attachment points let you lash on trekking poles or a sleeping pad.

How you reach your gear matters too. Top-loading packs are simple, durable, and lighter, but you dig from the top to reach the bottom. Packs with a front or side zipper let you get at the middle of the pack without unpacking everything, at the cost of a little weight and one more thing that can fail. Neither is wrong. Pick the access style that matches how organized you are and how often you need to reach deep into the bag.

Be skeptical of features sold as solutions to problems you do not have. A built-in hydration sleeve is genuinely handy. A dozen tiny compartments often just scatter your gear and make things harder to find. Weight adds up fast, and every gram of empty pack is a gram you carry up every hill.

Make the final call on comfort, not specs#

When you have narrowed it down, let your back and hips break the tie. The pack that carries a realistic load most comfortably is the right one, even if a competitor has a longer feature list or a lighter advertised weight. Comfort under load is the whole job. A few ounces saved mean nothing if the pack leaves you sore at mile eight.

Buy from a place with a fair return policy, load your new pack with your actual gear, and walk it around the neighborhood and up some stairs before you take it far. If it sits steady, rides on your hips, and stays quiet on your shoulders, you have found a pack that will let you go further without thinking about it. That, more than any feature, is what a good backpack buys you.

Caleb Frost
Written by
Caleb Frost

Caleb is a gear nerd who has tested more boots, tents, and stoves than he'd care to admit. He writes clear, hype-free reviews and how-tos for people who want kit that works, not kit that's trendy. His rule of thumb: the best gear is the lightest thing that does the job without failing on you.

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