BolderBOULDER
Race snapshot
Race Day
48–72°F · Feels mild
Total elevation gain
Challenging elevation · Net elevation change +400 ft
Participants
World-class event
Crowd Rating
Good crowd energy
The Lowdown
The BolderBOULDER is a 10K road race through the streets of Boulder, Colorado, held every Memorial Day since 1979. What began as a small local gathering of a few hundred friends has grown into one of the largest 10K races in the world, drawing more than 50,000 runners and walkers and roughly 70,000 spectators each year. The course winds through Boulder neighborhoods and downtown, climbing a steady net elevation gain of around 400 feet (122 meters) at an elevation over a mile above sea level, before finishing inside the University of Colorado's Folsom Field. Entrants are assigned to wave starts based on projected finish time, with the fastest runners in the earliest waves and a separate jogging wave for those expecting to finish between 75 and 90 minutes; a professional elite race follows the citizen waves. Bands, costumed spectators, and neighborhood parties line the route, giving the event its reputation as part road race, part street festival. The day culminates in the country's largest Memorial Day Tribute, a ceremony honoring fallen service members held on the Folsom Field infield after the race. The BolderBOULDER remains locally owned and operated, and has awarded elite prize money exceeding $150,000 in recent years.
Explore the course
Edition unconfirmed · 10K (6.2 miles / 10 km)
Questions about the BolderBOULDER 2027
When is the BolderBOULDER 2027?
Monday, May 31, 2027.
Where is the BolderBOULDER?
Boulder, Colorado, United States.
What time does the BolderBOULDER start?
The race starts at 6:50 AM, local time.
What is the BolderBOULDER time limit?
5 hours (must clear Folsom/Arapahoe by 11:30am, finish by 11:45am).
How do I enter the BolderBOULDER 2027?
Registration is open. Ways in: Online individual registration; Corporate Business Challenge team entry; Virtual/remote participation option.
How much does the BolderBOULDER 2027 cost?
Individual Entry (early registration): $64. Individual Entry (race week): $104. BOLDER Business Challenge: $94.
What is the BolderBOULDER elevation gain?
400 ft (122 m) of total elevation gain. Net elevation change: +400 ft (122 m). Challenging elevation.
What is the BolderBOULDER course like?
It passes Downtown Boulder, University of Colorado Boulder and Folsom Field. Course map
What is the weather like at the BolderBOULDER?
Race-day temperatures are usually 9–22 °C (48–72 °F). Feels mild.
How many runners does the BolderBOULDER have?
50,000 participants. World-class event.
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