10K races in Colorado, United States — 2026 running calendar

May

09

Colorado Women's Classic - Westminster

Westminster, Colorado, United States

Free - $60.00

Running

5K 10K 16.1K Kids Fun Run (100 yards)

May

29

SuperHeroes Run Denver/Aurora

Centennial, Colorado, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +8

Jun

06

The Steamboat Marathon

Steamboat Springs, Colorado, United States

$70.00 - $125.00

Running

Marathon Half-Marathon 10K

Jun

06

Colorado 13er (Half Marathon/10k/5k)

Louisville, Colorado, United States

$35.00 - $65.00

Running

Half-Marathon 10K 5K

Jun

12

All-Out Summer Breeze

Arvada, Colorado, United States

$20.00 - $65.00

Running

Half-Marathon 10K 5K +2

Jun

19

Run Juneteenth Day 5K/10K/13.1 Denver/Aurora

Centennial, Colorado, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

Jun

19

Red, White and Brew 5k, 10k & Half Marathon

Windsor, Colorado, United States

$18.00 - $68.00

Running

5K 10K Half-Marathon 1.6K +2

Jun

19

Treat Trot - Denver

Denver, Colorado, United States

$17.00 - $42.00

Running

Kids Dash 1.6K 5K 10K +3

Jun

20

Father's Day Classic 10k, 5k, & 1 Mile

Arvada, Colorado, United States

$12.00 - $44.00

Running

10K 5K 1.6K +2

Jun

20

Treat Trot Colorado Springs

Colorado Springs, Colorado, United States

$17.00 - $42.00

Running

Kids Dash 1.6K 5K 10K +3

Jun

24

Race in the Clouds - Alma Dirt Festival

Alma, Colorado, United States

Free - $90.00

Running Mountain biking Duathlon Trail running

Weekend Camping FREE Kids Mountain Bike and Trail Run Ultra Marathon +7

Jul

04

Let Freedom Run 5k/10k - Louisville

Louisville, Colorado, United States

Free - $45.00

Running

5K 10K Kids Fun Run - Free (approx 100 yards, untimed)