62 Upcoming Half Marathon Races Near Castle Rock, CO

Sun, Nov 11 race

All-Out Kooky-Spooky

Golden, CO

Sat, Nov 71 race

Turkey Trails- Denver

Littleton, CO

Sun, Nov 81 race

Turkey Trails - Colorado Springs

Colorado Springs, CO

Sat, Nov 141 race

Salute to Veterans 5K/10K/Half Marathon - Denver

Aurora, CO

Sun, Nov 151 race

Salute to Veterans 5K/10K/Half Marathon - Colorado Springs

Colorado Springs, CO

Sat, Nov 211 race

TURKEY TREK (13.1, 10k, 5k & 2k)

Arvada, CO

Sat, Dec 51 race

All-Out Fa La La

Westminster, CO

Sun, Dec 61 race

RunDenver Series 2026-27

Denver, CO

Sat, Jan 9, 20271 race

All-Out Polar Prowl

Arvada, CO

Sat, Jan 23, 20271 race

Chilly Willy 5K/10K/Half Marathon - Colorado Springs

Colorado Springs, CO

Sat, Jan 30, 20273 races

Coffee Lovers Run DENVER/AURORA

Centennial, CO

Coffee Lover Run DENVER/AURORA

Aurora, CO

Run for Donut DENVER/AURORA

Centennial, CO

Sat, Feb 6, 20272 races

All-Out Mardi Crawl

Arvada, CO

Stories Trail Runs

Colorado Springs, CO

Sun, Feb 14, 20272 races

The Toyota Super Half Marathon™& Game Day 5K™

Colorado Springs, CO

Ralston Creek Half Marathon & 5k

Arvada, CO

Sat, Feb 27, 20272 races

Run Together Against Breast Cancer DENVER/AURORA

Centennial, CO

Run For Mental Health DENVER/AURORA

Centennial, CO

Sat, Mar 6, 20271 race

Time to Paddy 5K/10K & Lucky 13.1 13.1 - Denver

Denver, CO

Sun, Mar 7, 20271 race

Time to Paddy 5K/10K & Lucky 13.1 - Colorado Springs

Colorado Springs, CO

Sun, Mar 21, 20271 race

All-Out Spring Fever

Golden, CO

Sat, Mar 27, 20273 races

SuperHeroes Run DENVER/AURORA

Centennial, CO

Always Hope Easter Run DENVER/AURORA

Aurora, CO

Always Hope Easter Run DENVER/AURORA

Centennial, CO

Sun, Apr 4, 20271 race

Three Creeks Half Marathon

Englewood, CO

Sat, Apr 10, 20272 races

Run for PB&J 5k/10k/13.1 DENVER/AURORA

Centennial, CO

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

Colorado Springs, CO

Sun, Apr 11, 20272 races

Spring Fling Prairie Dog Half, 10k, & 5k

Arvada, CO

Platte River Half-Marathon, Relay & 5k

Littleton, CO

Sat, Apr 24, 20275 races

All-Out Beat the Heat

Westminster, CO

Coffee Lover Run DENVER/AURORA

Aurora, CO

DoNot Stop Half Marathon/5K/10K - Colorado Springs

Colorado Springs, CO

Coffee Lovers Run DENVER/AURORA

Centennial, CO

Run for Donut DENVER/AURORA

Centennial, CO

Sun, Apr 25, 20271 race

DoNot Stop Half Marathon/5K/10K - Denver

Denver, CO

Sat, May 8, 20272 races

Hometown Half Marathon/5K/10K - Colorado Springs

Colorado Springs, CO

Run for Chocolate 5k/10k/13.1 DENVER/AURORA

Centennial, CO

Sun, May 9, 20271 race

Hometown Half Marathon/5K/10K - Denver

Denver, CO

Sun, May 16, 20271 race

2027 Colfax Marathon

Denver, CO

Sat, May 22, 20271 race

Farish Trail Race

Woodland Park, CO

Sat, May 29, 20271 race

SuperHeroes Run DENVER/AURORA

Centennial, CO

Sun, Jun 6, 20271 race

Colorado 13er (Half Marathon/10k/5k)

Louisville, CO

Sat, Jun 12, 20271 race

All-Out Summer Breeze

Arvada, CO

Sat, Jul 10, 20271 race

All-Out Dog Days

Westminster, CO

Sat, Jul 17, 20272 races

Heatwave Half Marathon/5K/10K - Denver

Denver, CO

Summer Splash Prairie Dog Half, 10k, & 5k

Castle Rock, CO

Sun, Jul 18, 20271 race

Heatwave Half Marathon/5K/10K - Colorado Springs

Colorado Springs, CO

Sat, Jul 31, 20271 race

Popsicle 5K/10K/Half - Colorado Springs

Colorado Springs, CO

Sun, Aug 1, 20271 race

Bound for Boston Marathon & Half Marathon - Denver

Denver, CO