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

Oct

10

Lions Roar for Fitness 5k/2.5k Challenge

Pueblo, Colorado, United States

Running

5K 2.5K

Oct

10

Breckenridge RunFest

Breckenridge, Colorado, United States

Running

10K 5K 1.6K Marathon +1

Oct

10

Dialysis Dash 5K

Grand Junction, Colorado, United States

Running

5K

Oct

10

Boulder XC Series Meet 1

Boulder, Colorado, United States

Running

5K 3K 1K

Oct

10

Kipling Villas 5K -

Littleton, Colorado, United States

Running

5K

Oct

10

ASDAsh 5K to Beat Tooth Decay

Aurora, Colorado, United States

Running

5K

Oct

10

Chicken Creek Challenge

Mancos, Colorado, United States

Running

3.5K 5K +2

Oct

10

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

Centennial, Colorado, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +8

Oct

08

Intermountain League XC Meet

Durango, Colorado, United States

Running

3K 5K

Oct

08

Foothills/Mile High League Championships

Morrison, Colorado, United States

Running

5K

Oct

07

Fall Foliage Fun Run

Salida, Colorado, United States

Running

5K

Oct

04

Strides for Sierra 5K run/walk

Arvada, Colorado, United States

Running

5K 1K