5K races in Colorado, United States — 2026 running calendar

All-Out Summer Breeze

Arvada, Colorado, United States

13 Jun, 2026 (Sat)

$40.00 - $85.00

Running

Half-Marathon 10K 5K +2

St Mary's Church "Loop the Lake 5K" at Lathrop State Park

Walsenburg, Colorado, United States

13 Jun, 2026 (Sat)

$35.00

Running

5K

Sam's Rainbow Run

Fort Collins, Colorado, United States

13 Jun, 2026 (Sat)

Free - $40.00

Running

5K 1.6K

Stepping Stone 5K

Littleton, Colorado, United States

13 Jun, 2026 (Sat)

$35.00

Running

5K 2.5K

Tutu Dash 5K

Broomfield, Colorado, United States

13 Jun, 2026 (Sat)

$20.00 - $32.50

Running

5K 1.6K

Treat Trot - Denver

Thornton, Colorado, United States

13 Jun, 2026 (Sat)

$22.00 - $44.00

Running

1.6K 5K 10K 15K

Holy Hammers Hustle for Habitat

Parker, Colorado, United States

13 Jun, 2026 (Sat)

$30.00

Running

4.8K

Garden of the Gods 10 Mile/10K and Trail Run

Colorado Springs, Colorado, United States

14 Jun, 2026 (Sun)

$15.00 - $90.00

Running, Trail running

16.1K 10K 4.7K

The Bullfrog Splashdown

Littleton, Colorado, United States

14 Jun, 2026 (Sun)

Free - $84.00

Running

10K 5K 2.4K 8.9K

Treat Trot Colorado Springs

Colorado Springs, Colorado, United States

14 Jun, 2026 (Sun)

$22.00 - $42.00

Running

1.6K 5K 10K 15K

Fatherhood 5k Family Run/Walk

Colorado Springs, Colorado, United States

20 Jun, 2026 (Sat)

$20.00 - $100.00

Running

5K

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

Centennial, Colorado, United States

20 Jun, 2026 (Sat) – 29 Aug, 2026

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +8