Colorado Race Calendar

Find upcoming endurance races in Colorado, laid out by month. Scan the dates, line them up against your training, and find the race that fits your season.

Endurance Grid lists 369 races in Colorado, from July 2026 to August 2027 across 96 cities.

Enter a city or ZIP code

United States Endurance Race Calendars
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All 50 statesYou’re viewing Colorado
369
Races
96
Cities
13
Sports

Popular cities in Colorado

Colorado Springs38Denver34Centennial30Littleton17Fort Collins15Westminster11Arvada10Pueblo10Loveland9Thornton9Aurora7Highlands Ranch7Boulder6Grand Junction6Bellvue5Buena Vista5Durango5Greeley5

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Frequently Asked Questions (FAQs)

How many endurance races are in Colorado?+
Endurance Grid's Race Calendar lists 369 upcoming endurance races in Colorado, spanning 13 sports across 96 cities, from July 2026 to August 2027.
Is there a race season in Colorado?+
Endurance races happen in Colorado year-round — spring, summer, and fall bring the most, and you'll still find events through the winter. Of the upcoming races on Endurance Grid's Race Calendar, the most are in September and August.
What types of endurance races are in Colorado?+
Colorado hosts adventure, road cycling, duathlon, gravel, HYROX, mountain bike, paddle, rucking, running, swimrun, trail running, triathlon, and ultra races.
Which Colorado cities have races?+
Endurance races in Colorado are held in Colorado Springs, Denver, Centennial, Littleton, Fort Collins, Westminster, Arvada, Pueblo, Loveland, and Thornton, plus 86 other cities.
What race distances can you find in Colorado?+
Colorado races cover a wide range of distances. Some available distances on Endurance Grid's Race Calendar span 1 Mile, 10 Mile, 100 Mile, 100+ mi, 100K, 10K, 10–20 mi, 15K, and more distances, across a wide range of sports like adventure, road cycling, duathlon, gravel, HYROX, mountain bike, paddle, rucking, running, swimrun, trail running, triathlon, and ultra races.