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Colorado Springs Marathon, Half, 5K, and Kids K
Colorado Springs, CO
Saturday, October 4th, 2025
Not So Flatt Breast Cancer Awareness Run/Walk
Westminster, CO
RunAbilities FUN Walk/Run/Roll
Parker, CO
Big Waves Family 5K run/walk Whiteout Presented...
I Can 5k
Thornton, CO
PRA Miner Gold Rush
Broomfield, CO
Strides for Sierra 5K run/walk
Arvada, CO
Sunday, October 5th, 2025
RMRR October Trophy Series
Aurora, CO
Fall Series - Get Dirty! Get Muddy!
Kids' Fall Series - Where Kids Run Free!
Healthy Kids Running Series Fall 2025 - Denver, CO
Denver, CO
Liberty Energy 5K - Benefiting the Bettering Hu...
Kipling Villas 5K - 2024
Littleton, CO
Saturday, October 11th, 2025
Manitou 5K
Manitou Springs, CO
Gummball 5K
Brighton, CO
Suffer Better 9th Annual Fall Trail Runs
Pine, CO
Westy Half & 5k
Sunday, October 12th, 2025
The bRUNch Run™ -
2025 DU Crimson Classic 5K Run/1.5 Mile Walk
Tuesday, October 14th, 2025
The Great Trailhead Foot Race 5 Miler
Lakewood, CO
Saturday, October 18th, 2025
Indian Creek Trail Runs
Sedalia, CO
Expo Park XC Runs
Sunday, October 19th, 2025
DU Crimson Classic 5K Run/1.5 Mile Walk
Wednesday, October 22nd, 2025
Apex Foundation Trick or Trot 5K & Halloween Hu...
Saturday, October 25th, 2025
Race to Cure Sarcoma Denver
YMCA Creepy Crawl 5K
Palmer Lake, CO
The 13th Annual Odyssey Odyssey - 2025
Sunday, October 26th, 2025
Ghosts and Goblins 5K/10K
Explore more in Elizabeth, CO
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