Upcoming Races Near Boulder, CO in October, 2025

Name: Ghosts and Goblins 5K/10K
Start: 2025-10-26
End: 2025-10-26
Location: Denver

Just the Long Runs

Boulder, CO

Sunday, October 12th, 2025

Featured

View details for race Just the Long Runs

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Westy Half & 5k

Westminster, CO

Sunday, October 12th, 2025

Half

View details for race Westy Half & 5k

The bRUNch Run™ -

Denver, CO

Sunday, October 12th, 2025

10K

15K

View details for race The bRUNch Run™ -

EDT XC Showdown

Aurora, CO

Sunday, October 12th, 2025

View details for race EDT XC Showdown

Joy & Justice 5k

Timnath, CO

Sunday, October 12th, 2025

1 Mile

View details for race Joy & Justice 5k

Jack-o’-Lantern Jog 5k

Fort Collins, CO

Monday, October 13th, 2025

Trail

View details for race Jack-o’-Lantern Jog 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

Blue Sky Trail Marathon & Half Marathon

Fort Collins, CO

Saturday, October 18th, 2025

Trail

View details for race Blue Sky Trail Marathon & Half Marathon

Homecoming 5k - Colorado State University

Fort Collins, CO

Saturday, October 18th, 2025

View details for race Homecoming 5k - Colorado State University

The Great Trailhead Foot Race 5 & 10 Miler

Lakewood, CO

Saturday, October 18th, 2025

10 Miles

View details for race The Great Trailhead Foot Race 5 & 10 Miler

Blue Sky Marathon & Half

Fort Collins, CO

Saturday, October 18th, 2025

Half

Marathon

View details for race Blue Sky Marathon & Half

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

Fast

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

Race to Cure Sarcoma Denver

Denver, CO

Saturday, October 25th, 2025

View details for race Race to Cure Sarcoma Denver

2025 Eerie Erie

Erie, CO

Saturday, October 25th, 2025

10K

Trail

View details for race 2025 Eerie Erie

Apex Foundation Trick or Trot 5K & Halloween Hunt

Arvada, CO

Saturday, October 25th, 2025

1 Mile

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

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 Redrum Fun Run

Greeley, CO

Saturday, October 25th, 2025

View details for race 2025 Redrum Fun Run

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

Fleet Feet Denver Just the Long Runs Fall Session

Littleton, CO

Sunday, October 26th, 2025

Trail

View details for race Fleet Feet Denver Just the Long Runs Fall Session

The 13th Annual Odyssey Odyssey - 2025

Denver, CO

Sunday, October 26th, 2025

1 Mile

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

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

Explore more in Boulder, CO

Distances:

5K 10K Half Marathon Marathon

Months:

October November December

Tags:

Trail Boston Qualifiers Fast Courses

State:

All Colorado races

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