10K2027

BolderBOULDER 10K

Monday, May 31, 2027

Boulder, CO · Confirmed with the organizer, checked October 8, 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: bolderboulder.com

About the race

Memorial Day tradition. Costumes encouraged.

Past race days

2026Monday, May 25
2025Monday, May 26
2024Monday, May 27
2023Monday, May 29
2022Monday, May 30
2021Not held

More races coming up

Rim Rock MarathonNov 1
Steamboat HalfJun 6, 2027
Estes Park HalfJun 20, 2027
Estes Park MarathonJun 20, 2027
Hardrock Hundred Endurance RunJul 9, 2027
High Lonesome 100Jul 16, 2027