When planning a trip, the very first decision you’ll make is which hiking backpack to bring. The right size can make or break your experience. If the backpack is too small and you’ll be cramming gear awkwardly, too big and you may end up carrying unnecessary weight. Let’s break down the different backpack sizes, what they can realistically carry, and how to choose the best fit for your trip.
Keep in mind, I'm making this guide under the assumption that you are planning on bringing “normal” hiking gear. This means mid-priced, mid-sized equipment that most hikers are going to have. I'm not factoring in any expensive ultra-compact tents, and I'm not counting on you bringing one of those giant military surplus sleeping bags.
Your Pack Should Hold All Your Gear
For a one-night trip in the woods, most backpackers bring the essentials: a tent, sleeping bag, pad, clothing, food, stove, water filter, toiletries, and maybe some extras like a camp stool or a book. A good hiking backpack should handle this load without straining seams or leaving gear dangling off the outside. But as you’ll see, size really matters.
Testing Small Backpacks: 25L and 32L
A 25L hiking backpack, like the Loris 25, is better suited for day hikes than overnights. While you might squeeze in a few essentials, tents and sleeping bags will likely hang off the outside. A 32L pack adds some space but you'll still find that you are running pretty low on storage space. If you’re planning a night out, these smaller packs can feel cramped and impractical.
Getting there: 36L to 47L
At 36L, things start to feel manageable. Everything fits inside, though just barely. Moving up to a 47L hiking backpack gives you breathing room, better organization, and comfort. This size works well for one- to two-night trips and strikes a balance between compactness and capacity, though for me it's still a little on the small side.
Kumo 36 Gossamer Gear
Spacious Options: 60L Hiking Backpacks
For those who like comfort, flexibility, or heavier gear, a 60L hiking backpack shines. You won’t have to stress about cramming items in, and you’ll have extra space for things like camera gear or luxury items. This size easily works for multi-day trips while still being manageable for a single overnight. It’s a favorite for backpackers who want a stress-free packing experience. This is my personal recommendation. You will likely have extra room, but extra room means extra gear, which is always good.
Going Big: 70L and Beyond
A 70L hiking backpack provides maximum room, often used on multi-day expeditions or when carrying group gear. While it’s more than you need for a single night, it’s incredibly versatile if you expect to haul extra comforts. Just remember—more space often means more weight, so only go this big if you’ll truly use the capacity.
Choosing a Hiking Backpack For You!
The best pack depends on your gear, comfort level, and trip length. For most one- to two-night adventures, a 47L–60L pack is the sweet spot, giving you enough room without unnecessary bulk. If you’re just starting out, lean toward a little extra space—you’ll thank yourself when packing feels effortless.
Check out my reviews of Gossamer Gear's Loris 25 and Mariposa 60L backpacks.
