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BolderBOULDER

Registration Open
Boulder, Colorado, United States
May 31, 2027 at 6:50 AM

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.

Race Day

Weather Forecast

spring
mild

Elevation

Terrain Profile

⛰️

Relatively flat course

Participants

Field Size

🎊
50,000RUNNERS

World-class event

Crowd Rating

Spectator Support

👏
5/ 10

Good crowd energy

Course Highlights
1

Downtown Boulder

2

University of Colorado Boulder

3

Folsom Field

Destination

Boulder, Colorado, United States

US

Est. Hotel Cost
$260/ night

Average rate for 3-star accommodations near the start line

0
Time Limit
5 hours (must clear Folsom/Arapahoe by 11:30am, finish by 11:45am)

Eligibility

  • Open entry; no minimum age enforced, though the course and wave system are best suited to participants able to walk or run the full 10K

Required Documents

  • Government-issued photo ID for bib pickup at the expo

Entry Methods

  • Online individual registration
  • Corporate Business Challenge team entry
  • Virtual/remote participation option

Cancellation & Refund Policy

Entries are generally non-refundable and non-transferable per event terms; deferral/transfer policy details are published closer to race day on the official site

Held annually on Memorial Day since 1979

Course finishes inside Folsom Field at the University of Colorado Boulder

Event concludes with the largest Memorial Day Tribute ceremony in the United States

Locally owned and operated

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Community

Stories, tips, and race-day snapshots from runners who have tackled this course.

Community Reviews

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