Running Race Calendar Near Thornton, Colorado

Sep

13

RMRR September Trophy Series

Thornton, Colorado, United States

$10.00

Running

10K 5K

Sep

13

Rmrr Fall Marathon Training Series #2

Thornton, Colorado, United States

$20.00 - $30.00

Running

20K 30K

Sep

27

Rmrr Fall Marathon Training Series #3

Thornton, Colorado, United States

$20.00 - $30.00

Running

16.1K 32.2K

Oct

03

I Can 5k

Thornton, Colorado, United States

Free

Running

5K +2

Oct

31

I Ain't Scared (of 5k)

Thornton, Colorado, United States

$45.00

Running

5K

Dec

12

WinterFest 5k & Fun Run

Thornton, Colorado, United States

$25.00

Running

5K

Jun

19

Unicorn 5k (North)

Thornton, Colorado, United States

$18.00 - $41.00

Running

5K 1K

Aug

27

Adams 12 MS XC

Thornton, Colorado, United States

Running

3.2K

Aug

23

Rmrr Fall Marathon Training Series

Thornton, Colorado, United States

Running

16.1K 32.2K

Aug

13

Usa Virtual Mile - Thornton

Thornton, Colorado, United States

$28.50

Running

1.6K

May

23

Memorial Day 5K Virtual Run - Thornton

Thornton, Colorado, United States

Running

5K

May

09

2026 Mother's Day Virtual 5k - Thornton

Thornton, Colorado, United States

Running

5K