Altra Lone Peak 9 (Men's) vs Mammut Aenergy Trail Endurance Ultra
Weight and specs compared for 2026 — and which one to choose.
Zero-drop trail running shoe designed for thru-hiking. FootShape toe box and MaxTrac outsole for grip. Weight per shoe in US size 9. Versatile for all condition...
Full details →Lightweight trail running shoe designed for mid-to-long distance runs and hiking. Features Vibram Megagrip outsole and FLEXTRON PRO plate for technical terrain.
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Altra Lone Peak 9 (Men's) vs Mammut Aenergy Trail Endurance Ultra: which should you buy?
If saving weight is your priority, the Altra Lone Peak 9 (Men's) wins — at 293 g it is 27 g (8%) lighter than the Mammut Aenergy Trail Endurance Ultra (320 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.
See where both rank against everything else in this category on the lightest footwear page, or browse the full gear weight database.