Half Marathon2027

Boulder Half Marathon

Sunday, September 26, 2027

Boulder, CO · Confirmed with the organizer, checked October 3, 2026

Save it in The Corral: a countdown to the start, and a cheer link your people open without the app. They pick a spot and leave an audio cheer that plays as you reach it.

Free on the App Store

Registration

Official site: boulderthon.org

About the race

Sister to Boulder Marathon. Flatirons backdrop.

More races coming up

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