Upcoming Half Marathon Races Near Longmont, CO

Singles & Friends Running Club DENVER/AURORA

Centennial, CO

Saturday, February 15th, 2025

Singles & Friends Running Club DENVER/AURORA

Aurora, CO

Saturday, February 15th, 2025

The Sloth Run Hybrid Race DENVER/AURORA

Aurora, CO

Saturday, February 22nd, 2025

All-Out Mardi Crawl

Arvada, CO

Saturday, February 22nd, 2025

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

Morrison, CO

Saturday, March 1st, 2025

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

Denver, CO

Saturday, March 1st, 2025

All-Out Spring Fever

Golden, CO

Sunday, March 23rd, 2025

Spring Equinox

Wellington, CO

Sunday, March 23rd, 2025

Fox Trot Hybrid Race DENVER/AURORA

Aurora, CO

Saturday, March 29th, 2025

Three Creeks Half Marathon

Englewood, CO

Sunday, April 13th, 2025

Horsetooth Half Marathon

Fort Collins, CO

Sunday, April 13th, 2025

Platte River Half-Marathon and Relay

Littleton, CO

Sunday, April 13th, 2025

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

Arvada, CO

Sunday, April 13th, 2025

Great Western Trail Race

Severance, CO

Saturday, April 19th, 2025

All-Out Beat the Heat

Westminster, CO

Saturday, April 19th, 2025

Bigfoot Half Marathon

Estes Park, CO

Saturday, April 26th, 2025

Runs With Scissors Races

Brighton, CO

Saturday, April 26th, 2025

Blue Heron Half & 5K

Brighton, CO

Sunday, April 27th, 2025

Cinco De Mayo Run: Against All Odds DENVER/AURORA

Aurora, CO

Saturday, May 3rd, 2025

Cinco De Mayo Run: Against All Odds DENVER/AURORA

Centennial, 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

Hometown Half Marathon & 5k/10k - Denver

Denver, CO

Saturday, June 21st, 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

All-Out Dog Days

Westminster, CO

Saturday, July 12th, 2025

Rocky Mountain Half Marathon & 5K

Estes Park, CO

Friday, August 1st, 2025

All-Out Runapalooza

Arvada, 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

Byers Peak Stampede Half Marathon & 5K Run

Fraser, 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

All-Out Fall Fest

Westminster, CO

Saturday, September 13th, 2025

Spooky Sprint - Denver

Denver, CO

Sunday, September 14th, 2025

Pioneer Prairie Dog Half, 10k & 5k

Westminster, CO

Saturday, September 27th, 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

All-Out Kooky-Spooky

Golden, CO

Sunday, November 2nd, 2025

All-Out Fa La La

Westminster, CO

Saturday, December 6th, 2025

All-Out Polar Prowl

Arvada, CO

Saturday, January 10th, 2026