Colorado · 10K
BolderBOULDER 10K
BolderBOULDER 10K is a 10K event held in Boulder, Colorado. Its next confirmed date is Monday, May 31, 2027. About 50,000 runners take part across all distances.
- Race day
- May 31, 2027
- Location
- Boulder, CO
- Field size
- ~50,000 runners
Race details
- Date
- Monday, May 31, 2027
- Location
- Boulder, Colorado
- Distances
- 10K
- Field size
- About 50,000 runners
- Course
- Rolling, net slightly downhill; ~5,400 ft altitude, finishes in Folsom Field
- Registration
- bolderboulder.com
- Official website
- bolderboulder.com
Registration, course & weather
- Registration status
- Open
- Start time
- 6:50 AM MDT
- Course profile
- Point-to-point course; Road surface
About the BolderBOULDER 10K
Colorado's biggest Memorial Day tradition since 1979, BolderBOULDER is a 10K run/walk/parade through Boulder that finishes inside the University of Colorado's Folsom Field. It draws over 50,000 participants and roughly 100,000 spectators each year.
Rankings and notes
- Rankings and awards
- One of the largest 10Ks in the world and 3rd/4th-largest road race in the US; named 'America's All-Time Best 10K' by Runner's World; ends with the largest Memorial Day Tribute in the country inside CU's Folsom Field
More 10Ks in Colorado
Coming up next, by confirmed date.
-
City Park Classic (5k/10k & 1 Mile Walk of Hope for Pancreatic Cancer Research)Denver, CO5K10K ~2,743 runners
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BolderBOULDER 10K: common questions
- When is the BolderBOULDER 10K?
- The next confirmed date is Monday, May 31, 2027.
- Where is the BolderBOULDER 10K held?
- In Boulder, Colorado.
- What distances does the BolderBOULDER 10K offer?
- 10K.
- How many people run the BolderBOULDER 10K?
- About 50,000 runners across all of its distances. That figure is an estimate of the field size, not an entry cap.
- How do I register for the BolderBOULDER 10K?
- Registration is handled by the organiser at bolderboulder.com. Entry fees, caps and deadlines are set there.
- Is registration open for the BolderBOULDER 10K?
- Yes — registration is open.
- What time does the BolderBOULDER 10K start?
- 6:50 AM MDT.
- What is the course like at the BolderBOULDER 10K?
- Point-to-point course; Road surface.
Plan this race in RaceRove
Save it to your plan, compare it with other races, check typical race-day weather and track your 50-state progress in the interactive app.