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

Unicorn 5k (North)

Thornton, Colorado, United States

20 Jun, 2026 (Sat)

$24.00 - $51.00

Running

5K 1K

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

Run for the River 5k Boulder

Boulder, Colorado, United States

20 Jun, 2026 (Sat)

$25.00

Running

5K

Sierra's 5K Run/Walk Race Against Meningitis

Loveland, Colorado, United States

20 Jun, 2026 (Sat)

$30.00

Running

5K

Fatherhood 5k Family Run/Walk

Colorado Springs, Colorado, United States

20 Jun, 2026 (Sat)

$20.00 - $100.00

Running

5K

Run Juneteenth Day 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

20 Jun, 2026 (Sat)

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

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

Windsor, Colorado, United States

20 Jun, 2026 (Sat)

$15.00 - $90.00

Running

5K 10K Half-Marathon 1.6K +2

Strawberry Shortcut

Glenwood Springs, Colorado, United States

21 Jun, 2026 (Sun)

$30.00 - $45.00

Running

10K 5K 1.6K

Juneteenth Fun Run 5K

Denver, Colorado, United States

21 Jun, 2026 (Sun)

$25.00 - $45.00

Running

5K

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

Arvada, Colorado, United States

21 Jun, 2026 (Sun)

$10.00 - $45.00

Running

10K 5K 1.6K +2

14th Annual Buffs4Life Kyle MacIntosh Memorial 5K Run/Walk

Boulder, Colorado, United States

21 Jun, 2026 (Sun)

$30.00

Running

5K

Virtual 14th Annual Buffs4Life Kyle MacIntosh Memorial 5K Run/Walk

Boulder, Colorado, United States

21 Jun, 2026 (Sun)

$30.00

Running

5K