Any Length
Any Month
Trail
Fast
BQ
Erie Half & 5k
Erie, CO
Sunday, August 17th, 2025
Staunton Rocks! Marathon & Half
Conifer, CO
Saturday, August 23rd, 2025
Staunton Rocks! Marathon and Half Marathon
Pine, CO
Byers Peak Stampede Half Marathon & 5K Run
Fraser, CO
Calarat Challenge Trail Running Festival
Jamestown, CO
Saturday, August 30th, 2025
Black Squirrel Half Marathon
Bellvue, CO
Saturday, September 6th, 2025
All-Out Fall Fest
Westminster, CO
Saturday, September 13th, 2025
National Chocolate Day: Run for Chocolates DENV...
Centennial, CO
Fall Equinox
Fort Collins, CO
Sunday, September 14th, 2025
Spooky Sprint - Denver
Denver, CO
Littleton, CO
13th Annual Superhero Event
Greeley, CO
Saturday, September 20th, 2025
Red Feather Trail Jamboree
Red Feather Lakes, CO
Friday, September 26th, 2025
Pioneer Prairie Dog Half, 10k & 5k
Saturday, September 27th, 2025
National Singles Day: Singles & Friends Running...
National Coffee Day: Run for Coffee DENVER/AURORA
Layafette Music Fest Half-Marathon/10K/5K
Louisville, CO
Sunday, October 5th, 2025
Windsor Marathon, Half Marathon, 10k, 5k & 1 Mi...
Windsor, CO
The Long View Marathon
Saturday, October 11th, 2025
Westy Half & 5k
Sunday, October 12th, 2025
Blue Sky Marathon & Half
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
10k Turkey Trek & 5k Turkey Trot - Now With HAL...
Arvada, CO
Saturday, November 22nd, 2025
All-Out Fa La La
Saturday, December 6th, 2025
All-Out Polar Prowl
Saturday, January 10th, 2026
Arctic Prairie Dog Half, 10k & 5k
Sunday, January 18th, 2026
All-Out Mardi Crawl
Sunday, February 22nd, 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
The Colorado Marathon
Sunday, May 3rd, 2026
Longmont Half & 5k (LM Half)
Longmont, CO
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
All-Out Dog Days
Saturday, July 11th, 2026
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