In 309 days · Mon, May 31, 2027
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When
Monday, May 31st, 2027
Where
30th St & Iris Ave, Boulder CO
Distance
10K
Typical weather
45–68°F · some rain risk
See last 10 years
Rained on 3 of the last 10 race days
2026
43–72°F
dry
2025
45–69°F
dry
2024
45–66°F
dry
2023
44–72°F
rain
2022
38–52°F
rain
2021
41–52°F
rain
2020
53–76°F
dry
2019
36–65°F
dry
2018
50–77°F
dry
2017
42–68°F
dry
Best months to race in Colorado →
About this race
Overview
- Event: Bolder Boulder 10K
- Date: 2027-05-31
- Location: 30th St & Iris Ave, Boulder, CO
- Website: bolderboulder.com
Event Highlights
- Participants: 40,000+ runners
- Route: Through the streets of Boulder
- Finish Line: Inside Folsom Field at the University of Colorado
- Tribute: One of the largest Memorial Day tributes in the nation
Course map
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