United States · Colorado
Colorado Race Calendar
Browse 5Ks, marathons, triathlons, cycling and more across Colorado — explore top cities, sports and upcoming dates.
- Events
- 761
- Cities with events
- 130
- Next race
- Aug 27
Last updated:
About
Racing in Colorado
Colorado lists 761 active races, with the busiest race scenes in Colorado Springs, Denver and Centennial. Running leads the Colorado calendar, alongside other running, cycling, swimming and multisport events across the state. Whether you're chasing a first 5K or a marathon PR, every listing below includes dates, distances and a direct link to register.
Every distance
From 5Ks and 10Ks to half marathons and longer, Colorado's calendar spans road, trail, cycling, swimming and triathlon events.
When to race
Spring and fall are the busiest seasons, but you will find events on the calendar throughout the year.
Easy to register
Every event shows its distances and dates with a direct link to the official registration page.
Coming soon
Upcoming Races in Colorado
Aug 27 - All groups @ Red Rocks (different meeting point for Adv) - 5:30 pm start!
Unbridled Golf Classic
Adams 12 MS XC
Valley Middle School XC
D'Evelyn Dash XC
Continental Divide Trail Run
Glow & Roll: Illuminate What's Possible
RexRun For PAWSitivity 2026 Trail Run/Walk
Rocky Mountain 5K presented by School District 11
Run for Hope - Colorado Springs
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Popular sports in Colorado
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Good to know
Frequently asked questions
Everything you need to know about finding and registering for races in Colorado.
Browse all events →How many races are there in Colorado?
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When is race season in Colorado?
Are there beginner-friendly races in Colorado?
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Ready to find your next race?
Browse every event in Colorado with dates, distances and registration links.
Browse all Colorado races