Running Races in Colorado — 2026

There are 386 running races in Colorado in 2026 across 99 cities. The next upcoming race is the HRCA Happy Hour Half K in Littleton on June 19. Popular distances include 5K races, trail runs, half marathons.

Browse by City

Colorado Springs 114 Denver 63 Centennial 45 Fort Collins 39 Littleton 28 Boulder 22 Loveland 20 Arvada 18 Aurora 16 Westminster 16 Pueblo 14 Thornton 14 Steamboat Springs 13 Durango 11 Buena Vista 11 Golden 10 Highlands Ranch 9 Parker 9 Louisville 9 Greeley 8 Aspen 8 Longmont 7 Windsor 7 Bellvue 6 Ridgway 6 Brighton 6 Canon City 6 Crested Butte 6 Lakewood 6 Idaho Springs 6

Mustang Mile 2026

Sat, Jun 20 · Kremmling, CO Kremmling
Road Regular Joe- For the "off the couch" crewFamilySpeedy Joe- For the most fierce competitors +2
From $10 Open Closing Soon
Register →

The Four Legged 5k

Fri, Jun 26 · Bailey, CO Bailey
Road Four Legged 5k - Adult (13 & Up)Four Legged 5k - Youth (12 & Under)
From $10 Open Closing Soon
Register →

SBT TRL

Sat, Jun 27 · Steamboat Springs, CO Steamboat Springs
Road 5k10k
From $35.75 Open Closing Soon
Register →

Durango Brewer's Trail Series

Thu, Jul 2 · Durango, CO Durango
Trail Anarchy Brewing - Benefiting ...High Trestle Finale - Benefiting The HiveSka Brewing - Benefiting the La Plata County Humane Society +1
From $30 Open
Register →

Palmer Lake July 4th Fun Run

Sat, Jul 4 · Palmer Lake, CO Palmer Lake
Virtual July 4 Fun Run - AdultJuly 4 Fun Run - Elementary Student and YoungerJuly 4 Fun Run - VIRTUAL RACE Elementary Student and Younger +3
From $20 Open
Register →