Half Marathon · Fort Collins

Half Marathons in Fort Collins, CO in September

Every half marathon happening in or near Fort Collins during September. Sorted by date with deterministic 0–100 scores so you can pick the right one for your goal.

We don't have enough data here yet, so this page isn't indexed by search engines.

Distance

5Ks 10Ks Half Marathons Marathons Trail Races

Month

All months Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Open in race search for full filters →

Half Marathon

Fall Equinox

Sun, Sep 20, 2026

Fort Collins, Colorado

road

Rolling

60PR40value75vibe

beer

music

scenic

Get an alert when a new race is added

Save this search and we'll email you when a matching race opens registration or drops in price.

Save this search

Explore more

5Ks in Fort Collins 10Ks in Fort Collins Marathons in Fort Collins Trail Races in Fort Collins All races in Colorado Half Marathons in Fort Collins (all months)