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Jack-o’-Lantern Jog 5k
Fort Collins, CO
Monday, October 13th, 2025
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2025 DU Crimson Classic 5K Run/1.5 Mile Walk
Denver, CO
Tuesday, October 14th, 2025
Boulder Turkey Trot Training Program
Boulder, CO
Wednesday, October 15th, 2025
The Great Trailhead Foot Race 5 Miler
Lakewood, CO
Saturday, October 18th, 2025
Mancos Cowboy Half Marathon, 5K, and Fun Run
Mancos, CO
Blue Sky Trail Marathon & Half Marathon
Homecoming 5k - Colorado State University
Blue Sky Marathon & Half
Indian Creek Trail Runs
Sedalia, CO
Paws for Life Fun Run/Walk 5K - Sponsored by Im...
Pueblo, CO
Expo Park XC Runs
Aurora, CO
Sunday, October 19th, 2025
Fleet Feet Denver Turkey Trot Training Program
Littleton, CO
Tuesday, October 21st, 2025
DU Crimson Classic 5K Run/1.5 Mile Walk
Wednesday, October 22nd, 2025
Foundry Halloween 5k
Steamboat Springs, CO
Saturday, October 25th, 2025
2025 Eerie Erie
Erie, CO
Apex Foundation Trick or Trot 5K & Halloween Hu...
Arvada, CO
McGraw Memorial Park "Quick Draw @ McGraw" 2 Mi...
Bailey, CO
Race to Cure Sarcoma Denver
Grand Valley Brew Runs
Grand Junction, CO
2025 Redrum Fun Run
Greeley, CO
Halloween Fun Run 5k & 1mile - Zombie Theme
Idaho Springs, CO
YMCA Creepy Crawl 5K
Palmer Lake, CO
YMCA of Pueblo Spooky Sprint 5K
The 13th Annual Odyssey Odyssey - 2025
Sunday, October 26th, 2025
Narrowleaf Lake Run & Pumpkin Run
Loveland, CO
Fleet Feet Denver Just the Long Runs Fall Session
Ghosts and Goblins 5K/10K
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