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Calarat Challenge Trail Running Festival
Jamestown, CO
Saturday, August 30th, 2025
Labor Day Half Marathon
Parker, CO
Monday, September 1st, 2025
Black Squirrel Half Marathon
Bellvue, CO
Saturday, September 6th, 2025
Trail Sisters Women's Half Marathon & 10k
Buena Vista, CO
Saturday, September 13th, 2025
National Chocolate Day: Run for Chocolates DENV...
Centennial, CO
All-Out Fall Fest
Westminster, CO
Spooky Sprint - Denver
Denver, CO
Sunday, September 14th, 2025
Fall Equinox
Fort Collins, CO
Littleton, CO
13th Annual Superhero Event
Greeley, CO
Saturday, September 20th, 2025
Autumn Run
Rim to Rim Royal Gorge Races: 5K Road Run, Trai...
Canon City, CO
Red Feather Trail Jamboree
Red Feather Lakes, CO
Friday, September 26th, 2025
National Coffee Day: Run for Coffee DENVER/AURORA
Saturday, September 27th, 2025
National Singles Day: Singles & Friends Running...
Pioneer Prairie Dog Half, 10k & 5k
Colorado Springs Marathon, Half, 5K, and Kids K
Colorado Springs, CO
Saturday, October 4th, 2025
Windsor Marathon, Half Marathon, 10k & 5k
Windsor, CO
Sunday, October 5th, 2025
Layafette Music Fest Half-Marathon/10K/5K
Louisville, CO
The Long View Marathon
Saturday, October 11th, 2025
Westy Half & 5k
Sunday, October 12th, 2025
Mancos Cowboy Half Marathon, 5K, and Fun Run
Mancos, CO
Saturday, October 18th, 2025
Blue Sky Marathon & Half
2025 Rim Rock Marathon and Half Marathon
Fruita, CO
Sunday, November 2nd, 2025
All-Out Kooky-Spooky
Golden, CO
HRCA Backcountry Wilderness Half Marathon
Lone Tree, CO
Saturday, November 8th, 2025
2025 Southwest Series - Day 2 (CO)
Durango, CO
Monday, November 10th, 2025
10k Turkey Trek & 5k Turkey Trot - Now With HAL...
Arvada, CO
Saturday, November 22nd, 2025
All-Out Fa La La
Saturday, December 6th, 2025
Rock Canyon Half Marathon
Pueblo, CO
Sunday, December 7th, 2025
All-Out Polar Prowl
Saturday, January 10th, 2026
Arctic Prairie Dog Half, 10k & 5k
Sunday, January 18th, 2026
Chilly Willy 5K/10K/Half Marathon-Colorado Springs
Saturday, January 24th, 2026
Super Half Marathon™ & Game Day 5K™ Presented b...
Sunday, February 8th, 2026
Stories Trail Runs
Saturday, February 21st, 2026
All-Out Mardi Crawl
Sunday, February 22nd, 2026
21st Annual Run Through Time Trail Marathon and...
Salida, CO
Saturday, March 14th, 2026
All-Out Spring Fever
Sunday, March 22nd, 2026
Spring Fling Prairie Dog Half, 10k, & 5k
Sunday, April 12th, 2026
Platte River Half-Marathon and Relay
All-Out Beat the Heat
Saturday, April 18th, 2026
Great Western Trail Race
Severance, CO
Horsetooth Half Marathon
Sunday, April 19th, 2026
Runs With Scissors Races
Brighton, CO
Saturday, April 25th, 2026
Longmont Half & 5k (LM Half)
Longmont, CO
Sunday, May 3rd, 2026
The Colorado Marathon
Colorado 13er (Half Marathon/10k/5k)
Sunday, June 7th, 2026
All-Out Summer Breeze
Saturday, June 13th, 2026
Red, White and Brew 5k, 10k, Half Marathon & 12...
Saturday, June 20th, 2026
Race in the Clouds - Alma Dirt Festival 2026
Alma, CO
Saturday, June 27th, 2026
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