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

2026 Mother's Day Virtual 5k - Westminster

Westminster, Colorado, United States

09 May, 2026 (Sat) – 11 May, 2026

Running

5K

2026 Mother's Day Virtual 5k - Thornton

Thornton, Colorado, United States

09 May, 2026 (Sat) – 11 May, 2026

Running

5K

Hometown Half Marathon & 5k/10k - Colorado Springs

Colorado Springs, Colorado, United States

09 May, 2026 (Sat)

Running

5K 10K Half-Marathon 1.6K +2

Longmont Half & 5k (LM Half)

Longmont, Colorado, United States

03 May, 2026 (Sun)

Running

Half-Marathon 5K

Water Wells for Africa 5k Walk/Run

Silt, Colorado, United States

03 May, 2026 (Sun)

Running

5K

Emerge 5K

Boulder, Colorado, United States

03 May, 2026 (Sun)

Running

5K

Hayden Cog Run

Hayden, Colorado, United States

03 May, 2026 (Sun)

Running

13.5K 5K

RMRR May Trophy Series

Denver, Colorado, United States

03 May, 2026 (Sun)

Running

8K 5K

2026 Altitude Elementary Moose Mudder

Aurora, Colorado, United States

03 May, 2026 (Sun)

Running

1K 5K

DU Spring Sprint 5k

Gunnison, Colorado, United States

02 May, 2026 (Sat)

Running

5.1K

Sunrise Marathon 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

02 May, 2026 (Sat)

Running

5K 10K Half-Marathon 1.6K +2

MayFest Fun Run

Parachute, Colorado, United States

02 May, 2026 (Sat)

Running

5.5K