Half Marathons in Colorado

Autumn Run · Buena Vista, Colorado

Pikes Peak Ascent · Manitou Springs, Colorado

Run the Rockies Half Marathon · Frisco, Colorado

All-Out Fall Fest · Westminster, Colorado

Beulah Challenge and OverIt Series · Beulah, Colorado

Fall Equinox · Fort Collins, Colorado

Red Feather Trail Jamboree · Red Feather Lakes, Colorado

Golden Leaf Half Marathon · Aspen, Colorado

Deep Creek Trail Half Marathon · Telluride, Colorado

WILD Wahatoya Runs · La Veta, Colorado

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

Golden Leaf Half Marathon · Aspen, Colorado

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

2026 Boulderthon Half Marathon · Boulder, Colorado

Boulderthon: Downtown Boulder Marathon · Boulder, Colorado

Running for Children's Rights to Both Parents - 9 of 50 Half Marathons in 50 States - Colorado · Boulder, Colorado

Girls on the Run Rockies Boulderthon SoleMates 2026 · Boulder, Colorado

2026 Center of the Nation Series - Day 2 (CO) · Sterling, Colorado

Colorado Springs Marathon, Half, 5K, and Kids K · Colorado Springs, Colorado

Bear Chase Race - Half Marathon & 10K · Lakewood, Colorado

Spooky Sprint - Denver · Littleton, Colorado

Castle Rock Trail Festival · Castle Rock, Colorado

Rim to Rim Royal Gorge Races: 5K Road Run, Trail 8 Mile, Trail Half Marathon · Canon City, Colorado

Pretzel Run Colorado · Louisville, Colorado

Windsor Marathon, Half Marathon, 10k, 5k & 1 Mile Run · Windsor, Colorado

New Belgium Half Marathon and 5K · Fort Collins, Colorado

The Long View Marathon · Fort Collins, Colorado

Breckenridge Road Marathon · Breckenridge, Colorado

Breckenridge RunFest · Breckenridge, Colorado

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

Westy Half & 5k · Westminster, Colorado

2026 Westminster Half Marathon & 5K · Westminster, Colorado

Durango Marathon · Durango, Colorado

Blue Sky Trail Marathon & Half Marathon · Fort Collins, Colorado

Mancos Cowboy Half Marathon, 5K, and Fun Run · Mancos, Colorado

Halloween Trick or Trot Run 5K/10K/13.1 DENVER/AURORA · Centennial, Colorado

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

All-Out Kooky-Spooky · Golden, Colorado

Rim Rock Marathon and Half Marathon · Fruita, Colorado

Rim Rock Marathon and Half Marathon · Fruita, Colorado

HRCA Backcountry Wilderness Half Marathon · Lone Tree, Colorado

Turkey Trails- Denver · Littleton, Colorado

Turkey Trails - Colorado Springs · Colorado Springs, Colorado

2026 Southwest Series - Day 2 (CO) · Durango, Colorado

Louisville Trail Race · Louisville, Colorado

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

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

TURKEY TREK (13.1, 10k, 5k & 2k) · Arvada, Colorado

Colorado Cold Rush · Colorado Springs, Colorado

Thanksgiving Gobble Trot Run 5K/10K/13.1 DENVER/AURORA · Centennial, Colorado