Upcoming Half Marathon Races In Colorado, US

Cinco De Mayo Run: Against All Odds DENVER/AURORA

Centennial, CO

Saturday, May 3rd, 2025

Cinco De Mayo Run: Against All Odds DENVER/AURORA

Aurora, CO

Saturday, May 3rd, 2025

The Colorado Marathon

Fort Collins, CO

Sunday, May 4th, 2025

Longmont Half & 5k (LM Half)

Longmont, CO

Sunday, May 4th, 2025

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

Louisville, CO

Sunday, June 1st, 2025

All-Out Summer Breeze

Arvada, CO

Saturday, June 7th, 2025

Steamworks Half Marathon

Durango, CO

Saturday, June 7th, 2025

Red, White and Brew 5k, 10k, Half Marathon & 12...

Windsor, CO

Saturday, June 21st, 2025

Hometown Half Marathon & 5k/10k - Denver

Westminster, CO

Saturday, June 21st, 2025

Hometown Half Marathon & 5k/10k - Denver

Denver, CO

Saturday, June 21st, 2025

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

Colorado Springs, CO

Sunday, June 22nd, 2025

Fleet Feet Denver Fall Half-Marathon Twelve-Wee...

Littleton, CO

Tuesday, July 8th, 2025

All-Out Dog Days

Westminster, CO

Saturday, July 12th, 2025

Aspen Valley Marathon

Aspen, CO

Saturday, July 19th, 2025

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

Castle Rock, CO

Saturday, July 19th, 2025

Rocky Mountain Half Marathon & 5K

Estes Park, CO

Friday, August 1st, 2025

Hero Hustle Colorado Springs

Colorado Springs, CO

Saturday, August 2nd, 2025

All-Out Runapalooza

Arvada, CO

Saturday, August 2nd, 2025

Popsicle 5K/10K/Half - Colorado Springs

Colorado Springs, CO

Saturday, August 2nd, 2025

Bound for Boston Marathon & Half Marathon - Denver

Denver, CO

Sunday, August 3rd, 2025

Erie Half & 5k

Erie, CO

Sunday, August 17th, 2025

TBK Bank Thirsty 13 Half Marathon

Durango, CO

Saturday, August 23rd, 2025

Staunton Rocks! Marathon & Half

Conifer, CO

Saturday, August 23rd, 2025

Byers Peak Stampede Half Marathon & 5K Run

Fraser, CO

Saturday, August 23rd, 2025

Staunton Rocks! Marathon and Half Marathon

Pine, CO

Saturday, August 23rd, 2025

Labor Day Half Marathon

Parker, CO

Monday, September 1st, 2025

Black Squirrel Half Marathon

Bellvue, CO

Saturday, September 6th, 2025

National Chocolate Day: Run for Chocolates DENV...

Centennial, CO

Saturday, September 13th, 2025

All-Out Fall Fest

Westminster, CO

Saturday, September 13th, 2025

Trail Sisters Women's Half Marathon & 10k

Buena Vista, CO

Saturday, September 13th, 2025

Spooky Sprint - Denver

Littleton, CO

Sunday, September 14th, 2025

Fall Equinox

Fort Collins, CO

Sunday, September 14th, 2025

Spooky Sprint - Denver

Denver, CO

Sunday, September 14th, 2025

13th Annual Superhero Event

Greeley, CO

Saturday, September 20th, 2025

Autumn Run

Buena Vista, CO

Saturday, September 20th, 2025

Rim to Rim Royal Gorge Races: 5K Road Run, Trai...

Canon City, CO

Saturday, September 20th, 2025

Red Feather Trail Jamboree

Red Feather Lakes, CO

Friday, September 26th, 2025

Pioneer Prairie Dog Half, 10k & 5k

Westminster, CO

Saturday, September 27th, 2025

National Singles Day: Singles & Friends Running...

Centennial, CO

Saturday, September 27th, 2025

National Coffee Day: Run for Coffee DENVER/AURORA

Centennial, CO

Saturday, September 27th, 2025

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

Colorado Springs, CO

Saturday, October 4th, 2025

Layafette Music Fest Half-Marathon/10K/5K

Louisville, CO

Sunday, October 5th, 2025

Windsor Marathon, Half Marathon, 10k & 5k

Windsor, CO

Sunday, October 5th, 2025

The Long View Marathon

Fort Collins, CO

Saturday, October 11th, 2025

Westy Half & 5k

Westminster, CO

Sunday, October 12th, 2025

Blue Sky Marathon & Half

Fort Collins, CO

Saturday, October 18th, 2025

Mancos Cowboy Half Marathon, 5K, and Fun Run

Mancos, CO

Saturday, October 18th, 2025

All-Out Kooky-Spooky

Golden, CO

Sunday, November 2nd, 2025

HRCA Backcountry Wilderness Half Marathon

Lone Tree, CO

Saturday, November 8th, 2025

2025 Southwest Series - Day 2 (CO)

Durango, CO

Monday, November 10th, 2025