Is a 70-Litre Pack Too Big for Most Backpackers?

Updated 2026-07-27 · 1 Tier Finds

The biggest mistake new backpackers make is buying for the trip they wish they were taking, rather than the one they are actually planning. You see a massive haulers at the store and think, "Better safe than sorry," but weight is the enemy of any good hike. If you're wondering is 70L backpack too large, the short answer is: for 80% of hikers, yes, it is.

A 70-liter pack is a beast. It’s designed for extended expeditions, winter camping with bulky gear, or for those carrying supplies for others. For a standard 3-to-5 day loop in a national park, a 70L pack often leads to "overpacking syndrome," where you fill the extra space with "just in case" items that only serve to make your shoulders ache.

Decoding Liter Capacity: How Much Do You Actually Need?

Capacity isn't just about the volume of the bag; it's about the weight you're willing to carry. Most modern gear—synthetic sleeping bags, lightweight tents, and compact stoves—has shrunk significantly. Here is the general rule of thumb for capacity:

• 20L–35L (Daypacks): Perfect for summit pushes, hiking to a lake and back, or ultra-light overnight trips if you have minimal gear.
• 40L–55L (Weekend/Lightweight): The sweet spot for most 2-3 night trips. This forces you to be disciplined with your gear choices.
• 60L–75L (Multi-Day Haulers): Necessary for trips longer than a week, winter treks requiring heavy layers, or if you're hauling a child's gear.

If you find yourself with a massive amount of dead space in a 70L pack, the load will shift and sway, throwing off your center of gravity and increasing fatigue. If you are currently shopping for hiking backpacks on Amazon, look at your gear spread out on the floor first to see which volume actually fits your kit.

The Non-Negotiables: Torso Fit and Hip Belts

Capacity is secondary to fit. A 50L pack that fits perfectly will feel lighter than a 70L pack that doesn't. You cannot determine fit by the overall height of the bag; you must measure your torso length (from the C7 vertebra to the top of your iliac crest).

The hip belt is where 80% of the weight should reside. If you feel the weight pulling on your shoulders, your hip belt is either too loose or the torso length is wrong. Look for dual-density foam belts that wrap comfortably around your hip bones without pinching. Avoid "one size fits all" packs if you are on the extreme ends of the height spectrum; look for adjustable torso lengths or S/M/L sizing.

Essential Features vs. Marketing Fluff

Don't pay extra for bells and whistles that don't add utility. Focus on these three areas:

Hydration Compatibility: Ensure the pack has an internal sleeve for a water bladder and a dedicated port for the hose. Digging through your main compartment for water every hour is a recipe for frustration.

Access Points: Top-loading is standard, but a "J-zip" or front-panel access is a lifesaver. It allows you to grab a rain jacket or a map from the bottom of the pack without dumping everything on the dirt.

Weight of the Pack Itself: This is where ultralight packs come in. A premium ultralight pack might weigh 2 lbs, while a budget heavy-duty hauler could weigh 5 lbs before you put a single piece of gear in it. That 3-lb difference is noticeable by mile ten.

Budgeting for Your Gear

You don't need to spend $400 to get a reliable pack, but you get what you pay for in terms of suspension and durability.

Budget ($50–$150): These are usually basic nylon bags with minimal padding. Great for casual hikers or short trips, but they often lack the sophisticated suspension needed for loads over 30 lbs.

Mid-Range ($150–$300): This is the sweet spot. You'll get better ripstop fabrics, adjustable torso lengths, and supportive frames that can handle 35–50 lbs comfortably.

Premium ($300+): You are paying for weight reduction (Dyneeema or high-tenacity nylon) and specialized ergonomics. These are for the gear junkies and long-haul thru-hikers.

Maintenance and Common Mistakes

The most common mistake is over-tightening the shoulder straps before the hip belt. Always cinch the hips first, then the load lifters (the straps at the top of the shoulders), and finally the sternum strap.

To maintain your pack, never machine wash it—the agitation destroys the waterproof coatings and foam. Use a mild soap, a soft brush, and air dry. Also, avoid overstuffing the outer mesh pockets; if you jam a heavy water bottle in there, it can pull the pack off-balance.

FAQ

Is a 70L backpack too large for a 3-day trip?

Yes. For a 3-day trip, a 70L pack is overkill. You'll likely find yourself carrying unnecessary items just to fill the space, or dealing with a shifting load. A 45L to 55L pack is typically ideal for this duration.

Can I use a 70L pack for day hiking?

You can, but it's impractical. The pack's own weight and bulk make it cumbersome. For day trips, a 20L-30L daypack is far more efficient and comfortable.

How do I know if my pack is the right size?

When fully loaded, the weight should feel like it's sitting on your hips, not hanging from your shoulders. If there is a gap between the shoulder strap and your back, or if the hip belt is sliding, the torso length is incorrect.