Race Calendar in Colorado, United States near Boulder

Mile High Mile

Boulder, Colorado, United States

23 May, 2026 (Sat)

Free - $25.00

Running, Wheelchair

3.2K 1.6K +3

BRR All-Comers Summer Track & Field Series #1

Boulder, Colorado, United States

11 Jun, 2026 (Thu)

$15.00 - $20.00

Running

Ultra 1.6K 3K +1

Run for the River 5k Boulder

Boulder, Colorado, United States

20 Jun, 2026 (Sat)

$25.00

Running

5K

Sunset Trail Running Festival

Boulder, Colorado, United States

21 Jun, 2026 (Sun)

$20.00 - $75.00

Trail running

28K 12K 5K 1K

14th Annual Buffs4Life Kyle MacIntosh Memorial 5K Run/Walk

Boulder, Colorado, United States

21 Jun, 2026 (Sun)

$30.00

Running

5K

BRR All-Comers Summer Track & Field Series #2

Boulder, Colorado, United States

25 Jun, 2026 (Thu)

$20.00

Running

3K

Pearl Street Mile

Boulder, Colorado, United States

27 Jun, 2026 (Sat)

$40.00

Running

1.6K

Avery Brewing Co. 4K on the 4th

Boulder, Colorado, United States

04 Jul, 2026 (Sat)

$40.00

Running

4K

BRR All-Comers Summer Track & Field Series #3

Boulder, Colorado, United States

09 Jul, 2026 (Thu)

$20.00

Running

Ultra 1.6K 5K +1

BRR All-Comers Summer Track & Field Series #4

Boulder, Colorado, United States

23 Jul, 2026 (Thu)

Free - $20.00

Running

Ultra 3.2K

BRR All-Comers Summer Track & Field Series #5

Boulder, Colorado, United States

06 Aug, 2026 (Thu)

$20.00

Running

Ultra 1.6K

Buffalo Bicycle Classic

Boulder, Colorado, United States

13 Sep, 2026 (Sun)

$125.00 - $200.00

Cycling, Gravel biking

Ultra 22.5K +5