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

Run for Donuts 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

25 Jul, 2026 (Sat) – 26 Sep, 2026

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +8

Run for Coffee Lovers 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

25 Jul, 2026 (Sat)

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

Popsicle 5K/10K/Half - Colorado Springs

Colorado Springs, Colorado, United States

01 Aug, 2026 (Sat)

$35.00 - $60.00

Running

5K 10K Half-Marathon +5

Choice City Running Festival

Fort Collins, Colorado, United States

07 Aug, 2026 (Fri) – 08 Aug, 2026

Free - $71.00

Running

1.6K 5K 10K Half-Marathon +4

All-Out Runapalooza

Arvada, Colorado, United States

08 Aug, 2026 (Sat)

$40.00 - $353.00

Running

Half-Marathon 10K 5K +2

Summer Sizzler- Denver

Thornton, Colorado, United States

08 Aug, 2026 (Sat)

$22.00 - $36.00

Running

1.6K 5K 10K 15K

Eat. Run. Adopt. 10K

Berthoud, Colorado, United States

08 Aug, 2026 (Sat)

$40.00

Running

10K

Summer Sizzler- Colorado Springs

Colorado Springs, Colorado, United States

09 Aug, 2026 (Sun)

$22.00 - $34.00

Running

1.6K 5K 10K 15K

Run for PB& J 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

15 Aug, 2026 (Sat)

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

Bagel Run 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

15 Aug, 2026 (Sat) – 10 Oct, 2026

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +8

2026 True Impact Ministries 5K/10K

Centennial, Colorado, United States

22 Aug, 2026 (Sat)

$39.00

Running

5K 10K

Pioneer Prairie Dog Half, 10k & 5k

Westminster, Colorado, United States

23 Aug, 2026 (Sun)

$40.00 - $80.00

Running

Half-Marathon 10K 5K