5K Races in Boulder, Colorado 2026 — MyNextRace | My Next Race

There are 8 5K races in Boulder, Colorado in 2026. The next is the Run for the River 5k Boulder on June 20.

Run for the River 5k Boulder

Sat, Jun 20 · Boulder, CO Boulder

Run for the River 5k Boulder

From $25 Open Closing Soon

2026 CANCELED-14th Annual Buffs4Life Kyle MacIntosh Memorial 5K Run/Walk

Sun, Jun 21 · Boulder, CO Boulder

Road In-Person 5K Run/Walk

From $30 Closed

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

Sun, Jun 21 · Boulder, CO Boulder

Road Virtual 5K Run/Walk

From $30 Closed

BRR All-Comers Summer Track & Field Series #2

Thu, Jun 25 · Boulder, CO Boulder

Road Steeplechase (3000 + 2000)100m200m +11

From $20 Open Closing Soon 15 spots left

Pearl Street Mile

Sat, Jun 27 · Boulder, CO Boulder

Road Pearl Street MileKids 800m

From $15 Open Closing Soon

Avery Brewing Co. 4K on the 4th

Sat, Jul 4 · Boulder, CO Boulder

Road Avery Brewing Co. 4K on the 4th

From $40 Open Closing Soon

BRR All-Comers Summer Track & Field Series #3

Thu, Jul 9 · Boulder, CO Boulder

Road 5000m100M200M +10

From $20 Open 15 spots left

Running for Children's Rights to Both Parents - 9 of 50 Half Marathons in 50 States - Colorado

Sun, Sep 27 · Boulder, CO Boulder

Virtual 5K (Virtual)10K (Virtual)1/2 Marathon (Virtual) +1

From $40 Open