Upcoming Races in Colorado
Showing the comprehensive 2026 race calendar for Colorado.
Distance
Month
St. Paddy's Day Lucky Run 5K/10K/13.1 DENVER/AURORA
Centennial, CO • March 14, 2026
ShamROCK Stampede 5k & RRCA 10k State Championship
Castle Rock, CO • March 14, 2026
Erin Go Bragh 7.77k
Westminster, CO • March 14, 2026
Luck of the Irish 7k
Steamboat Springs, CO • March 14, 2026
HRCA St. Patrick's Day 5K
Highlands Ranch, CO • March 14, 2026
Sharin' O' The Green 5k
Fort Collins, CO • March 14, 2026
Run Through Time Trail Marathon and Half Marathon
Salida, CO • March 14, 2026
Lucky Brew Race 5K, 10K, and 15K
Severance, CO • March 14, 2026
Lucky Leprechaun 5K
Boulder, CO • March 15, 2026
Central Park 5k
Denver, CO • March 22, 2026
All-Out Spring Fever
Golden, CO • March 22, 2026
The City Park Circuit
Denver, CO • March 28, 2026
All Hands on Deck The Pirates 5K
Colorado Springs, CO • March 28, 2026
Cryogenic Cannibal Chase
Estes Park, CO • March 28, 2026
RMRR Spring Marathon Training Series #1
Thornton, CO • March 29, 2026
The Grand Traverse
Crested Butte, CO • March 29, 2026
The Grand Traverse
Crested Butte, CO • March 29, 2026
Spring Equinox
Wellington, CO • March 29, 2026
Always Hope Easter Run 5K/10K/13.1 DENVER/AURORA
Centennial, CO • April 4, 2026
Run for Breast Cancer 5K/10K/13.1 DENVER/AURORA
Centennial, CO • April 4, 2026
Three Creeks Half Marathon
Englewood, CO • April 5, 2026
Hot Laps - Denver
Denver, CO • April 9, 2026
Run the Ranch
Loveland, CO • April 10, 2026
Dash for Detection: Oral Cancer Awareness 5K
Denver, CO • April 11, 2026
Run Through The Decades 6K/7K/8K/Half - Colorado Springs
Colorado Springs, CO • April 11, 2026
NoCo Urban Ultra & Relay
Greeley, CO • April 11, 2026
CRMAC Uplift Her - 5K Run/Walk
Fort Collins, CO • April 11, 2026
RMRR Spring Marathon Training Series #2
Thornton, CO • April 11, 2026
Rockin on the River 5K
Littleton, CO • April 11, 2026
ASDAsh 5K to Beat Tooth Decay
Aurora, CO • April 11, 2026
Platte River Half-Marathon and Relay
Littleton, CO • April 12, 2026
RMRR April Trophy Series
Denver, CO • April 12, 2026
Boulder Track Series Meet 1
Longmont, CO • April 12, 2026
Spring Fling Prairie Dog Half, 10k, & 5k
Arvada, CO • April 12, 2026
Hop Into Spring 5K - Denver
Denver, CO • April 12, 2026
Donut Dash
Denver, CO • April 12, 2026
Elevate Kids Fun Run
Grand Junction, CO • April 12, 2026
Desert Rats Trail Running Festival by UTMB
Fruita, CO • April 12, 2026
Mountain Ridge 22M, Half, 10K
Highlands Ranch, CO • April 18, 2026
Woody's Tortoise And Hare
Fountain, CO • April 18, 2026
Donot Stop Half Marathon (5k/10k) - Colorado Springs
Colordo Springs, CO • April 18, 2026
All-Out Beat the Heat
Westminster, CO • April 18, 2026
Great Western Trail Race
Severance, CO • April 18, 2026
Earth Day 5K
Durango, CO • April 18, 2026
Sky Rim Duathlon
Durango, CO • April 18, 2026
Rattler Trail Races
Colorado Springs, CO • April 18, 2026
DoNot Stop Half Marathon (5k/10k) - Denver
Littleton, CO • April 19, 2026
Fairmount 5k
Golden, CO • April 19, 2026
Horsetooth Half Marathon
Fort Collins, CO • April 19, 2026
Cheyenne Mountain Trail Race
Colorado Springs, CO • April 25, 2026