Half Marathons in Colorado

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

Always Hope Easter Run 5K/10K/13.1 DENVER/AURORA · Centennial, Colorado

Three Creeks Half Marathon · Englewood, Colorado

Run Through The Decades 6K/7K/8K/Half - Colorado Springs · Colorado Springs, Colorado

Mountain Ridge Trail Race · Highlands Ranch, Colorado

Boulder Rez Half · Boulder, Colorado

Prairie Dog Run Series · Louisville, Colorado

Platte River Half-Marathon, Relay & 5k · Littleton, Colorado

Spring Fling Prairie Dog Half, 10k, & 5k · Arvada, Colorado

Desert RATS Trail Running Festival · Fruita, Colorado

Donot Stop Half Marathon (5k/10k) - Colorado Springs · Colorado Springs, Colorado

All-Out Beat the Heat · Westminster, Colorado

Great Western Trail Race · Severance, Colorado

DoNot Stop Half Marathon (5k/10k) - Denver · Westminster, Colorado

Horsetooth Half Marathon - Presented by Fort Collins Connexion · Fort Collins, Colorado

Colorado Brewery Running Series - Left Hand Brewing Half Marathon · Longmont, Colorado

Runs With Scissors Races · Brighton, Colorado

Bigfoot Half Marathon · Estes Park, Colorado

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

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

NOCO Half Marathon & 10K · Loveland, Colorado

Blue Heron Half & 5K · Brighton, Colorado

Sunrise Marathon 5K/10K/13.1 DENVER/AURORA · Centennial, Colorado

Cinco De Mayo Run 5K/10K/13.1 DENVER/AURORA · Centennial, Colorado

Longmont Half & 5k (LM Half) · Longmont, Colorado

The Colorado Marathon · Fort Collins, Colorado

Hometown Half Marathon & 5k/10k - Colorado Springs · Colorado Springs, Colorado

Mothers Day Run Colorado - Louisville · Boulder, Colorado

Valkyrie Trail Race · Colorado Springs, Colorado

Hometown Half Marathon & 5k/10k - Denver · Denver, Colorado

Super Mom 5K/10K/Half - Colorado Springs · Colorado Springs, Colorado

Fruita Trail Half · Fruita, Colorado

Endure Trail Runs · Divide, Colorado

Girls on the Run Rockies Colfax SoleMates 2026 · Denver, Colorado

Wild Horse Half · De Beque, Colorado

Denver Colfax Marathon · Denver, Colorado

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

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

Spirit Trail Run · Buena Vista, Colorado

Weld Your Mettle Running Festival · Eaton, Colorado

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

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

Steamworks Half Marathon · Durango, Colorado

2026 Basalt Half Marathon & Relay · Basalt, Colorado

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

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

The Steamboat Marathon · Steamboat Springs, Colorado

Colorado Brewery Running Series - Breckenridge Half Marathon and 5K · Littleton, Colorado

All-Out Summer Breeze · Arvada, Colorado

Barr Lake 30K and 15K · Brighton, Colorado