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Patagonia Ascensionist 35L vs ULA Circuit

Weight and specs compared for 2026 — and which one to choose.

ULA Circuit is the lighter option — 58 g lighter than the Patagonia Ascensionist 35L (8% less weight). If grams matter to you, that is the one to beat.
Spec Patagonia Ascensionist 35L ULA Circuit
Weight 738 g · 0.738 kg · 1.63 lb 680 g · 0.680 kg · 1.50 lb
Brand Patagonia ULA
Category Backpack Backpack
Patagonia Ascensionist 35L
738 g

Lightweight climbing and hiking 35L pack.

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ULA Circuit
680 g

Ultralight 68L frameless pack. Thru-hiker favourite.

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Patagonia Ascensionist 35L vs ULA Circuit: which should you buy?

If saving weight is your priority, the ULA Circuit wins — at 680 g it is 58 g (8%) lighter than the Patagonia Ascensionist 35L (738 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 backpack page, or browse the full gear weight database.

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