Running Race Calendar in Colorado, United States

Spirit of the Valley 5k

Grand Junction, Colorado, United States

12 Sep, 2026 (Sat)

$10.00 - $35.00

Running

5K 1K

RMRR September Trophy Series

Thornton, Colorado, United States

13 Sep, 2026 (Sun)

$10.00

Running

10K 5K

9/11 Heroes Run - Denver, Colorado

Denver, Colorado, United States

13 Sep, 2026 (Sun)

Free - $40.00

Running

5K 1.6K +3

Rmrr Fall Marathon Training Series #2

Thornton, Colorado, United States

13 Sep, 2026 (Sun)

$20.00 - $30.00

Running

20K 30K

Severance Glow 5K Run or Walk

Severance, Colorado, United States

18 Sep, 2026 (Fri)

$35.00

Running

5K

Miles 4 Madison 5K & 1K

Littleton, Colorado, United States

19 Sep, 2026 (Sat)

$25.00

Running

5K 1K

Wellington STAR Foundation 5K 10K

Wellington, Colorado, United States

19 Sep, 2026 (Sat)

$15.00 - $53.00

Running

5K 10K +2

Beulah Challenge and OverIt Series

Beulah, Colorado, United States

19 Sep, 2026 (Sat)

$20.00 - $180.00

Running

Half-Marathon 10K 5K +2

Denver: Walk With Autism and Resource Fair

Denver, Colorado, United States

19 Sep, 2026 (Sat)

$25.00

Running

5K

Lederhosen Race 2026

Red Feather Lakes, Colorado, United States

19 Sep, 2026 (Sat)

$35.00

Running

5.8K

Autumn Run

Buena Vista, Colorado, United States

19 Sep, 2026 (Sat)

Free - $90.00

Running

Half-Marathon 10K 5K 1K

Gummball 5K

Brighton, Colorado, United States

19 Sep, 2026 (Sat)

$30.00

Running

5K