When it comes to thru-hiking, every ounce matters. Whether you’re tackling the Appalachian Trail, the PCT, or your own epic long-distance trek, having the right ultralight backpack can make or break your experience. In 2025, gear innovation is pushing lighter materials, modular designs, and ergonomic fits to new heights. Here are 10 top contenders for this year:

1. Zpacks Arc Haul Ultra – A fan favorite for a reason. Waterproof Dyneema fabric, customizable options, and excellent suspension.
2. Hyperlite Mountain Gear 3400 Southwest – Ultra-durable and minimalistic, with a sleek profile perfect for narrow trails.
3. ULA Circuit – A great balance between comfort, weight, and capacity (just over 2 lbs).
4. Atom Packs Mo EP50 – Custom-made in the UK, offering lightweight performance and personal flair.
5. Gossamer Gear Mariposa 60 – Versatile with large external pockets and just enough padding.
6. Pa’lante V2 Pack – For ultralight purists. No frame, no frills, just efficiency.
7. Granite Gear Crown3 60 – Affordable, functional, and surprisingly light for its volume.
8. Durston Kakwa 55 – A rising star with smart design, lightweight frame, and Canadian reliability.
9. Six Moon Designs Swift X – Durable and lightweight, with a comfy hip belt and minimalist layout.
10. Montbell Versalite Pack 40 – Japanese design focused on simplicity and rain protection.

When choosing your pack, consider torso length, hip belt fit, and your base weight. Remember: ultralight gear often sacrifices padding or features — know your priorities before committing. These packs have been tested on trails worldwide, so you can hike lighter and longer with confidence.