United States · Colorado
Colorado Race Calendar
Browse 5Ks, marathons, triathlons, cycling and more across Colorado — explore top cities, sports and upcoming dates.
- Events
- 661
- Cities with events
- 122
- Next race
- Jul 12
Last updated:
About
Racing in Colorado
Colorado lists 661 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
Heatwave Half Marathon - Colorado Springs
RMRR July Trophy Series
Rocky Mountain State Games - Swim / Run
Surf and Turf Triathlon
Wednesday Worlds Ute Valley Park
July 16 - Beginner / Advanced @ Monument, Mt Herman Trailhead
July 16 - Intermediate @ Cheyenne Canon
PNAAF 5K Wellness Challenge
High Lonesome 100
2026 OCA Colorado 5K Panda Run
Browse by sport
Popular sports in Colorado
Most active
Top cities for races
Browse by city
All cities in Colorado
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?
Which Colorado cities host the most races?
When is race season in Colorado?
Are there beginner-friendly races in Colorado?
How do I register for a race?
Ready to find your next race?
Browse every event in Colorado with dates, distances and registration links.
Browse all Colorado races