Half Marathons in Colorado

Steamworks Half Marathon · Durango, Colorado

2026 Basalt Half Marathon & Relay · Basalt, Colorado

Summits Trail Runs · Granby, Colorado

SuperHeroes Run 5K/10K/13.1 DENVER/AURORA · Centennial, Colorado

The Valley Bottom Rio Trio · Alamosa, Colorado

2.2 for 22q Walk/Run/Ride 2026 · Anywhere, Colorado

Colorado 13er (Half Marathon/10k/5k) · Louisville, Colorado

Breckenridge Brewery Half Marathon & 5K · Littleton, Colorado

The Steamboat Marathon · Steamboat Springs, Colorado

All-Out Summer Breeze · Arvada, Colorado

Barr Lake 30K and 15K · Brighton, Colorado

Run Juneteenth Day 5K/10K/13.1 DENVER/AURORA · Centennial, Colorado

Red, White and Brew 5k, 10k & Half Marathon · Windsor, Colorado

Estes Park Marathon · Estes Park, Colorado

Race in the Clouds - Alma Dirt Festival 2026 · Alma, Colorado

Slacker Half Marathon-Relay-4-Mile Races · Georgetown, Colorado

The Sunlight Showdown · Glenwood Springs, Colorado

Operation HAYSTACK · Nederland, Colorado

July 4th ROCK-IT Run · Castle Rock, Colorado

July 4th Run 5K/10K/13.1 DENVER/AURORA · Centennial, Colorado

Run for Chocolate 5K/10K/13.1 DENVER/AURORA · Centennial, Colorado

6th Annual July 4th ROCK-IT RUN · Castle Rock, Colorado

Colorado Brewery Running Series - Wheat Ridge Half Marathon and 5K · Wheat Ridge, Colorado

Wheat Ridge Half Marathon and 5K · Wheat Ridge, Colorado

All-Out Dog Days · Westminster, Colorado

Heatwave Half Marathon - Denver · Littleton, Colorado

Heatwave Half Marathon - Colorado Springs · Colorado Springs, Colorado

Surf and Turf Triathlon · Aurora, Colorado

Summer Splash Prairie Dog Half, 10k, & 5k · Castle Rock, Colorado

Barr Trail Mountain Race · Manitou Springs, Colorado

Aspen Valley Marathon · Aspen, Colorado

Run for Coffee Lovers 5K/10K/13.1 DENVER/AURORA · Centennial, Colorado

Sheep Mountain Trail Runs · Fairplay, Colorado

Rocky Mountain Half Marathon · Estes Park, Colorado

Popsicle 5K/10K/Half Marathon -Colorado Springs · Colorado Springs, Colorado

Bound for Boston Marathon & Half Marathon - Denver · Denver, Colorado

Choice City Running Festival · Fort Collins, Colorado

Georgetown to Idaho Springs Half Marathon · Unknown, Colorado

Run the Rockies Trail Race · Frisco, Colorado

All-Out Runapalooza · Arvada, Colorado

Georgetown to Idaho Springs Half Marathon · , Colorado

Emerald Mountain Epic · Steamboat Springs, Colorado

Boulder Rez Marathon · Boulder, Colorado

Mt. Sneffels Half Marathon & 10K · Ouray, Colorado

Westminster Trail Race · Westminster, Colorado

The Cheyenne Mountain Run · Colorado Springs, Colorado

Run for PB& J 5K/10K/13.1 DENVER/AURORA · Centennial, Colorado

Erie Half & 5k · Erie, Colorado

Byers Peak Stampede Half Marathon & 5K Run · Fraser, Colorado

Staunton Rocks! Marathon and Half Marathon · Pine, Colorado