On Running Cloudultra 3 vs Topo Athletic Pursuit 2
Weight and specs compared for 2026 — and which one to choose.
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Same kind of shoe, so weight is a fair tiebreaker.
Both are trail running shoes. The On Running Cloudultra 3 is 22 g a pair lighter than the Topo Athletic Pursuit 2.
What the On Running Cloudultra 3 offers besides the lower weight
- More cushioning under the heel (32 mm stack against 28 mm).
Weights are per pair as Alpinetrek lists them, usually for a medium size, so a few grams either way can come from the size they weighed. The other specs were checked on 19 October 2026 against Alpinetrek (On Running Cloudultra 3) and Alpinetrek (Topo Athletic Pursuit 2). "Not stated" means the source does not mention it, not that the shoe lacks it. List prices are the full price shown by that source, not a sale price; where sources disagree we show none.
Choose the On Running Cloudultra 3 if…
…you move fast on trails, run some of it, and want the lightest and most flexible shoe; it gives little ankle support under a heavy pack.
Choose the Topo Athletic Pursuit 2 if…
…you move fast on trails, run some of it, and want the lightest and most flexible shoe; it gives little ankle support under a heavy pack.
Building a pack? Add either one to your HikeLoad list, or drop its weight into the base weight calculator, and see what it does to your total weight.
See where both rank against everything else in this category on the lightest footwear page, or browse the full gear weight database.