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

Oct

04

Liberty Energy 5K - Benefiting the Bettering Human Lives Foundation

Denver, Colorado, United States

Running

5K 1K Post-Race Celebration Pass

Oct

04

The Michael J. Fox Foundation's Denver Run/Walk

Denver, Colorado, United States

Running

Kids Run (3-12 years old) 1.6K 5K

Oct

04

The Welton Run 5K

Denver, Colorado, United States

Running

5K

Oct

04

Strides for Sierra 5K run/walk

Arvada, Colorado, United States

Running

5K 1K

Oct

04

RMRR October Trophy Series

Aurora, Colorado, United States

Running

12.9K 5K

Oct

03

I Can 5k

Thornton, Colorado, United States

Running

5K +2

Oct

03

Rainbow Trail Lutheran Camp's Grace Race 5k

Denver, Colorado, United States

Running

5K

Oct

03

Homecoming 5K - Colorado State University

Fort Collins, Colorado, United States

Running

5K +1

Oct

03

Ethiopians 5K

Aurora, Colorado, United States

Running

5K

Oct

03

Mustang Music 5K

Fort Collins, Colorado, United States

Running

5K 1.6K Mustang Music ZEROK: Non-Participant T-Shirt Only

Oct

03

Pat Patten Invitational

Boulder, Colorado, United States

Running

5K 1.6K

Oct

03

Rim to Rim Royal Gorge Races: 5K Road Run, Trail 8 Mile, Trail Half Marathon

Canon City, Colorado, United States

Running

5K 12.9K Half-Marathon 10K +2