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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
Mancos Cowboy Half Marathon, 5K, and Fun Run
Mancos, CO
Saturday, October 18th, 2025
Blue Sky Trail Marathon & Half Marathon
Paws for Life Fun Run/Walk 5K - Sponsored by Im...
Pueblo, CO
Homecoming 5k - Colorado State University
The Great Trailhead Foot Race 5 Miler
Lakewood, CO
Indian Creek Trail Runs
Sedalia, CO
Blue Sky Marathon & Half
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
McGraw Memorial Park "Quick Draw @ McGraw" 2 Mi...
Bailey, CO
Saturday, October 25th, 2025
YMCA of Pueblo Spooky Sprint 5K
2025 Eerie Erie
Erie, CO
Foundry Halloween 5k
Steamboat Springs, CO
Apex Foundation Trick or Trot 5K & Halloween Hunt
Arvada, CO
2025 Redrum Fun Run
Greeley, CO
Grand Valley Brew Runs
Grand Junction, CO
Halloween Fun Run 5k & 1mile - Zombie Theme
Idaho Springs, CO
Race to Cure Sarcoma Denver
YMCA Creepy Crawl 5K
Palmer Lake, CO
Fleet Feet Denver Just the Long Runs Fall Session
Sunday, October 26th, 2025
Ghosts and Goblins 5K/10K
Narrowleaf Lake Run & Pumpkin Run
Loveland, CO
The 13th Annual Odyssey Odyssey - 2025
Colorado 24 Hour Run
Saturday, November 1st, 2025
City Park 5k & 1 Mile Walk of Hope for Pancreat...
Colleen De Reuck XC Classic
Girls on Run Southern Colorado 5K
Colorado Springs, CO
11th edition Sole Mates 5k & Brew Fest presente...
Longmont, CO
Turkey Trails- Denver
Sunday, November 2nd, 2025
Feet for Justice Run
Dragon Dash 5K Run/Walk
RMRR November Trophy Series
Girls on the Run Northern Colorado Fall 5K
All-Out Kooky-Spooky
Golden, CO
2025 Rim Rock Marathon and Half Marathon
Fruita, CO
Turkey Trails - Colorado Springs
Alamosa Veterans Memorial Park Race
Alamosa, CO
Saturday, November 8th, 2025
Denver Veterans Day Run
BSBF 2- Mile Fun Run - Bell Ringer
Panda Waddle 5k
BINGO! Trail Party
Byers, CO
HRCA Backcountry Wilderness Half Marathon
Lone Tree, CO
Bell Ringer 4 Miler
Mountain Madness Fall Frenzy Orienteering Trail...
Sunday, November 9th, 2025
Colorado Springs Veterans Day 5k
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