Running Races in Colorado — 2026

There are 387 running races in Colorado in 2026 across 100 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 Westminster 16 Aurora 16 Thornton 14 Pueblo 14 Steamboat Springs 13 Durango 11 Buena Vista 11 Golden 10 Highlands Ranch 9 Louisville 9 Parker 9 Greeley 8 Aspen 8 Longmont 7 Windsor 7 Crested Butte 6 Bellvue 6 Brighton 6 Canon City 6 Idaho Springs 6 Lakewood 6 Ridgway 6

Mustang Mile 2026

Sat, Jun 20 · Kremmling, CO Kremmling
Road Senior Joe- For the 65+ crowdFamilySpeedy Joe- For the most fierce competitors +2
From $10 Open Closing Soon
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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
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SBT TRL

Sat, Jun 27 · Steamboat Springs, CO Steamboat Springs
Road 5k10k
From $35.75 Open Closing Soon
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Durango Brewer's Trail Series

Thu, Jul 2 · Durango, CO Durango
Trail Anarchy Brewing - Benefiting MMIR Task Force COHigh Trestle Finale - Benefiting The HiveSka Brewing - Benefiting the La Plata County Humane Society +1
From $30 Open
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Palmer Lake July 4th Fun Run

Sat, Jul 4 · Palmer Lake, CO Palmer Lake
Virtual July 4 Fun Run - Elementary Student and YoungerJuly 4 Fun Run - Middle School and High School StudentJuly 4 Fun Run - Adult +3
From $20 Open Closing Soon
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