Upcoming Races Near Denver, CO in October, 2025

Name: The 13th Annual Odyssey Odyssey - 2025
Start: 2025-10-26
End: 2025-10-26
Location: Denver

Featured Races Get Seen

Be the first race runners see — and grow your registrations. Put your race at the top.

Feature Your Race

Learn how to feature your race

Flyin' Ryan Memorial 5k

Greeley, CO

Friday, October 3rd, 2025

View details for race Flyin' Ryan Memorial 5k

Rainbow Trail Lutheran Camp's 19th Annual Grace...

Denver, CO

Saturday, October 4th, 2025

Trail

View details for race Rainbow Trail Lutheran Camp's 19th Annual Grace Race 5k

Not So Flatt Breast Cancer Awareness Run/Walk

Westminster, CO

Saturday, October 4th, 2025

10K

View details for race Not So Flatt Breast Cancer Awareness Run/Walk

Big Waves Family 5K run/walk Whiteout Presented...

Westminster, CO

Saturday, October 4th, 2025

View details for race Big Waves Family 5K run/walk Whiteout Presented by Brumate

I Can 5k

Thornton, CO

Saturday, October 4th, 2025

View details for race I Can 5k

PRA Miner Gold Rush

Broomfield, CO

Saturday, October 4th, 2025

1 Mile

View details for race PRA Miner Gold Rush

RunAbilities FUN Walk/Run/Roll

Parker, CO

Saturday, October 4th, 2025

Trail

View details for race RunAbilities FUN Walk/Run/Roll

RMRR October Trophy Series

Aurora, CO

Sunday, October 5th, 2025

Fast

View details for race RMRR October Trophy Series

Liberty Energy 5K - Benefiting the Bettering Hu...

Denver, CO

Sunday, October 5th, 2025

View details for race Liberty Energy 5K - Benefiting the Bettering Human Lives Foundation

Windsor Marathon, Half Marathon, 10k & 5k

Windsor, CO

Sunday, October 5th, 2025

Marathon

Half

10K

Trail

View details for race Windsor Marathon, Half Marathon, 10k & 5k

Strides for Sierra 5K run/walk

Arvada, CO

Sunday, October 5th, 2025

View details for race Strides for Sierra 5K run/walk

Layafette Music Fest Half-Marathon/10K/5K

Louisville, CO

Sunday, October 5th, 2025

Half

View details for race Layafette Music Fest Half-Marathon/10K/5K

Healthy Kids Running Series Fall 2025 - Denver, CO

Denver, CO

Sunday, October 5th, 2025

View details for race Healthy Kids Running Series Fall 2025 - Denver, CO

Suffer Better 9th Annual Fall Trail Runs

Pine, CO

Saturday, October 11th, 2025

Ultra

Trail

View details for race Suffer Better 9th Annual Fall Trail Runs

Boulder XC Series Meet 1

Boulder, CO

Saturday, October 11th, 2025

View details for race Boulder XC Series Meet 1

Gummball 5K

Brighton, CO

Saturday, October 11th, 2025

View details for race Gummball 5K

ASDAsh 5k

Aurora, CO

Saturday, October 11th, 2025

View details for race ASDAsh 5k

Kipling Villas 5K - 2024

Littleton, CO

Saturday, October 11th, 2025

View details for race Kipling Villas 5K - 2024

The bRUNch Run™

Denver, CO

Sunday, October 12th, 2025

10K

15K

View details for race The bRUNch Run™

Westy Half & 5k

Westminster, CO

Sunday, October 12th, 2025

Half

View details for race Westy Half & 5k

2025 DU Crimson Classic 5K Run/1.5 Mile Walk

Denver, CO

Tuesday, October 14th, 2025

View details for race 2025 DU Crimson Classic 5K Run/1.5 Mile Walk

Boulder Turkey Trot Training Program

Boulder, CO

Wednesday, October 15th, 2025

View details for race Boulder Turkey Trot Training Program

Indian Creek Trail Runs

Sedalia, CO

Saturday, October 18th, 2025

Trail

View details for race Indian Creek Trail Runs

The Great Trailhead Foot Race 5 Miler

Lakewood, CO

Saturday, October 18th, 2025

10 Miles

View details for race The Great Trailhead Foot Race 5 Miler

Expo Park XC Runs

Aurora, CO

Sunday, October 19th, 2025

View details for race Expo Park XC Runs

Fleet Feet Denver Turkey Trot Training Program

Littleton, CO

Tuesday, October 21st, 2025

View details for race Fleet Feet Denver Turkey Trot Training Program

DU Crimson Classic 5K Run/1.5 Mile Walk

Denver, CO

Wednesday, October 22nd, 2025

1 Mile

View details for race DU Crimson Classic 5K Run/1.5 Mile Walk

Apex Foundation Trick or Trot 5K & Kids' Hallow...

Arvada, CO

Saturday, October 25th, 2025

1 Mile

View details for race Apex Foundation Trick or Trot 5K & Kids' Halloween Hunt

YMCA Creepy Crawl 5K

Palmer Lake, CO

Saturday, October 25th, 2025

Trail

View details for race YMCA Creepy Crawl 5K

Race to Cure Sarcoma Denver

Denver, CO

Saturday, October 25th, 2025

View details for race Race to Cure Sarcoma Denver

Halloween Fun Run 5k & 1mile - Zombie Theme

Idaho Springs, CO

Saturday, October 25th, 2025

1 Mile

View details for race Halloween Fun Run 5k & 1mile - Zombie Theme

2025 Redrum Fun Run

Greeley, CO

Saturday, October 25th, 2025

View details for race 2025 Redrum Fun Run

McGraw Memorial Park "Quick Draw @ McGraw" 2 Mi...

Bailey, CO

Saturday, October 25th, 2025

Trail

View details for race McGraw Memorial Park "Quick Draw @ McGraw" 2 Mile Trail Race

2025 Eerie Erie

Erie, CO

Saturday, October 25th, 2025

10K

Trail

View details for race 2025 Eerie Erie

Narrowleaf Lake Run & Pumpkin Run

Loveland, CO

Sunday, October 26th, 2025

1 Mile

10K

15K

View details for race Narrowleaf Lake Run & Pumpkin Run

Ghosts and Goblins 5K/10K

Denver, CO

Sunday, October 26th, 2025

View details for race Ghosts and Goblins 5K/10K

The 13th Annual Odyssey Odyssey - 2025

Denver, CO

Sunday, October 26th, 2025

1 Mile

View details for race The 13th Annual Odyssey Odyssey - 2025

Explore more in Denver, CO

Distances:

5K 10K Half Marathon Marathon

Months:

September October November

Tags:

Trail Boston Qualifiers Fast Courses

State:

All Colorado races

Don't see your race? Add it!

Add Your Race (Free)