Running Races in Boulder, Colorado 2026 | Browse All Races

There are 7 running races in Boulder, Colorado in 2026. The next is the BRR All-Comers Summer Track & Field Series #4 on July 23. Distances include ultras, 5K races, half marathons.

BRR All-Comers Summer Track & Field Series #4

Thu, Jul 23 · Boulder, CO Boulder

Road Steeplechase 3k100M200M +11

From $20 Open Closing Soon 15 spots left

Boulder Kids' Tri Camp

Mon, Aug 3 · Boulder, CO Boulder

Triathlon Boulder Kids' Tri Camp

From $200 Open 30 spots left

BRR All-Comers Summer Track & Field Series #5

Thu, Aug 6 · Boulder, CO Boulder

Road 100M200M400M +9

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 (In-Person) +1

From $40 Open

Alpine Bank Boulder Thanksgiving Day 5K

Thu, Nov 26 · Boulder, CO Boulder

Road 5KKids 800M

From $15 Closed

Hands & Voices New Year Virtual 5K: Trails to the Summit

Thu, Dec 31 · Boulder, CO Boulder

Virtual Hands & Voices New Year Virtual 5K

From $25 Closed

Emerge 5K

Sun, May 2 · Boulder, CO Boulder

Closed

Running Races in Boulder, Colorado — 2026