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Jack-o’-Lantern Jog 5k
Fort Collins, CO
Monday, October 13th, 2025
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Blue Sky Trail Marathon & Half Marathon
Saturday, October 18th, 2025
Indian Creek Trail Runs
Sedalia, CO
Mancos Cowboy Half Marathon, 5K, and Fun Run
Mancos, CO
The Great Trailhead Foot Race 10 Miler & 5k
Lakewood, CO
Foundry Halloween 5k
Steamboat Springs, CO
Saturday, October 25th, 2025
2025 Eerie Erie
Erie, CO
YMCA Creepy Crawl 5K
Palmer Lake, CO
McGraw Memorial Park "Quick Draw @ McGraw" 2 Mi...
Bailey, CO
Fleet Feet Denver Just the Long Runs Fall Session
Littleton, CO
Sunday, October 26th, 2025
All-Out Kooky-Spooky
Golden, CO
Sunday, November 2nd, 2025
Girls on the Run Northern Colorado Fall 5K
HRCA Backcountry Wilderness Half Marathon
Lone Tree, CO
Saturday, November 8th, 2025
BINGO! Trail Party
Byers, CO
Mountain Madness Fall Frenzy Orienteering Trail...
Sunday, November 9th, 2025
Canya Cañon Trail Race & Family Hike
Colorado Springs, CO
10k Turkey Trek & 5k Turkey Trot
Arvada, CO
Saturday, November 22nd, 2025
2025 Loveland Turkey Trot
Loveland, CO
Thursday, November 27th, 2025
Sawmill Trail Runs
Pine, CO
Saturday, December 6th, 2025
All-Out Fa La La
Westminster, CO
Rock Canyon Half Marathon
Pueblo, CO
Sunday, December 7th, 2025
Santa Catch 5k & 10k
Windsor, CO
Saturday, December 13th, 2025
Run Like a Reindeer 5K
Winter Park, CO
Saturday, December 20th, 2025
Resolute Runner 5k
Thursday, January 1st, 2026
All-Out Polar Prowl
Saturday, January 10th, 2026
Rio Frio 5k on Ice
Alamosa, CO
Saturday, January 24th, 2026
Ralston Creek Half Marathon & 5k
Sunday, February 15th, 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
Lucky Brew Race 5K, 10K, and 15K
Saturday, March 21st, 2026
All-Out Spring Fever
Sunday, March 22nd, 2026
Run the Ranch
Friday, April 10th, 2026
Platte River Half-Marathon and Relay
Sunday, April 12th, 2026
Great Western Trail Race
Severance, CO
Saturday, April 18th, 2026
All-Out Beat the Heat
Horsetooth Half Marathon - Presented by Fort Co...
Sunday, April 19th, 2026
Greenland Trail Races
Larkspur, CO
Saturday, May 2nd, 2026
Endure Trail Runs
Divide, CO
Saturday, May 16th, 2026
Aiden's Adventure 5k
Saturday, June 6th, 2026
Summits Trail Runs
Granby, CO
Colorado 13er (Half Marathon/10k/5k)
Louisville, CO
Sunday, June 7th, 2026
All-Out Summer Breeze
Saturday, June 13th, 2026
Race in the Clouds - Alma Dirt Festival 2026
Alma, CO
Saturday, June 27th, 2026
Pueblo's Firecracker 5k!
Saturday, July 4th, 2026
All-Out Dog Days
Saturday, July 11th, 2026
Summer Splash Prairie Dog Half, 10k, & 5k
Castle Rock, CO
Saturday, July 18th, 2026
Kennebec Mountain Run
Hesperus, CO
Saturday, August 1st, 2026
Byers Peak Stampede Half Marathon & 5K Run
Fraser, CO
Saturday, August 22nd, 2026
RexRun For PAWSitivity 2026 Trail Run/Walk
Aurora, CO
Saturday, August 29th, 2026
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