5K Races in Boulder, Colorado 2026 — MyNextRace

There are 2 5K races in Boulder, Colorado in 2026. The next is the Colleen De Reuck XC Classic on October 31.

Sat, Oct 31 · Boulder, CO Boulder

Road 1K XC - 10 Years & Under3K XC - 16 Years & Under5K XC - Open

From $15 Open Closing Soon

Thu, Dec 31 · Boulder, CO Boulder

Virtual Virtual 5KVirtual Fun Run/Walk

From $25 Open

5K Races in Boulder, Colorado