Mammut Trion 50L Backpack
Some packs feel like luggage. The Mammut Trion 50 feels like equipment.
This is a 50L alpine pack built for ski touring, mountaineering, and long days where you’re carrying real weight and actually using your gear. The fabric is tough, water-resistant, and not precious about getting scraped on rock or sliced by ski edges. It holds its shape when loaded, which matters when you’re moving through steep terrain and don’t want your pack shifting every step.
Access is one of the best parts. You get full back panel entry, plus top and side access, so you can get to what you need without detonating your whole system. There’s a proper avalanche safety pocket that keeps shovel and probe separate and easy to grab. Ice tool carry is secure, ski carry is stable, and everything stays tight when things get technical.
On the back, it carries like it’s meant to be loaded. This isn’t a floppy ultralight bag. Reviews across the Trion line consistently point to its stability under heavier loads and its no-nonsense build. The tradeoff is weight and a more focused use case, but that’s kind of the point.
Who this works for
Ski tourers who pack for real conditions
Alpinists doing hut trips or technical objectives
Climbers who want one pack that handles rope, tools, and layers without a fight
The feel
It’s structured, compact, and expects you to pack with intention. Once you do, everything lands where it should and stays there. No rattling, no shifting, no surprises halfway up something steep.
Bottom line
The Trion 50 is built for days where the pack matters. Load it up, move through terrain, trust that it’ll hold together. That’s the job.
Capacity: 50L
Dimensions: 60 x 35 x 33 cm
Back Length: 46 cm (Medium)
Weight: 1510g
Returns and Exchanges
We accept returns on eligible items within 15 days of delivery, provided the product is in like-new condition.
Footwear may be tried indoors only (home or treadmill). All returned items must be unworn beyond fit testing, include original manufacturer packaging and hang tags (fees may apply if damaged) and have been purchased from SkiUphill-RunUphill within the 15-day window. Apparel must be completely unworn.
Final Sale / Non-Returnable Items
All sale items are final sale. The following items are not eligible for return: carbon-plated running shoes, avalanche safety equipment (transceivers, shovels, probes, airbags), climbing equipment (ropes, harnesses, carabiners, belay devices, slings), ski crampons, helmets and gift cards.
Return Process & Fees
International returns are not accepted. A 10% deduction applies to all refunds to cover credit card processing and administrative fees.
For more information on returns and exchanges, click here.