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Keen Seek Trail Runner vs On Running Cloudultra 2

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

No winner on weight yet. The recorded weights have not both been verified on the same basis. Size, included parts and single-item versus pair weights can differ. Check the linked sources before choosing a replacement.

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Spec Keen Seek Trail Runner On Running Cloudultra 2
Weight 307 g · 0.307 kg · 0.68 lb
as listed — one shoe or a pair, not yet confirmed
 590 g · 0.590 kg · 1.30 lb
per pair (medium-sized pair)
Brand Keen On Running
Category Footwear Footwear
Keen Seek Trail Runner
307 g as listed

Trail runners with wide toe box and high cushioning for technical terrain.

See it in your base weight → Full details →
On Running Cloudultra 2
590 g

Ultra trail shoe with CloudTec cushioning for long distances.

See it in your base weight → Full details →

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Keen Seek Trail Runner vs On Running Cloudultra 2: which should you buy?

The listed weights alone are not enough to choose between these products. Confirm the size, included parts and weight basis against each source; choose equipment for the function and fit you need.

See where both rank against everything else in this category on the lightest footwear page, or browse the full gear weight database.

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