Running Races in Colorado — 2026

There are 349 running races in Colorado in 2026 across 96 cities. The next upcoming race is the One Is Too Many: Veteran Suicide Awareness 5k and Kids Run in Greeley on July 19. Popular distances include 5K races, half marathons, trail runs.

Browse by City

Colorado Springs 122 Denver 68 Centennial 50 Fort Collins 41 Littleton 32 Boulder 24 Loveland 20 Aurora 19 Arvada 19 Pueblo 19 Westminster 16 Thornton 14 Steamboat Springs 13 Durango 12 Buena Vista 11 Highlands Ranch 10 Golden 10 Louisville 9 Windsor 9 Parker 9 Bellvue 8 Greeley 8 Aspen 8 Longmont 7 Grand Junction 7 Canon City 6 Ridgway 6 Crested Butte 6 Lakewood 6 Brighton 6

Pat's Pony Express

Sat, Aug 8 · Woodland Park, CO Woodland Park
Trail Pat's Pony Express - 8 MilePat's Pony Express - 16 Mile
From $65 Open Closing Soon 75 spots left
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Sunrise Stampede

Sat, Aug 15 · Longmont, CO Longmont
Road FREE 1 MILE ENTRIES: First 25 SVVSD Students to enter!!!1 Mile Fun Run/Walk (all ages)5k Run/Walk +2
From $0 Open 25 spots left
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ThunderRidge Grizzly 2 Mile

Sat, Aug 15 · Highlands Ranch, CO Highlands Ranch
Road Elementary/Middle School Mile (All Middle Schoolers sign up for this)Community 2 Mile (All members of the community, including parents, friends and staff members)ThunderRidge High School 2 Mile (TRXC High School Athletes Only)
From $10 Open
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Ram Run

Sat, Aug 22 · Denver, CO Denver
Virtual Ram Run Kids Race (12 and under) 1 mileRam Run - VirtualRam Run 5k Run
From $10 Open
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RMRR Fall Marathon Training Series

Sun, Aug 30 · Thornton, CO Thornton
Road RMRR Fall Marathon Training Series #1 - 10 MileRMRR Fall Marathon Training - 3 race bundle Short (10m, 20k, 10m)RMRR Fall 2023 Marathon Training Series #1 - 20 Mile +1
From $20 Open
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