Colorado Runner

BOLDERBoulder Co-Founders Steve Bosley and Frank Shorter Recognized Among Colorado’s 150…

Sep 3, 2026 64

Aug 31, 2026 32

Aug 31, 2026 17

For a full list of race results, click here.

Labor Day Half Marathon

Half Marathon, 10K and 5K
September 7, 2026
Salisbury Park | Parker, CO

Ghosts & Goblins 5K

5K and 10K
October 25, 2026
City Park | Denver, CO

Pumpkin Pie 5K

5K and 10K
November 21, 2026
City Park | Denver, CO

Ugly Sweater 5K

5K
December 20, 2026
Washington Park | Denver, CO

Donut Dash

5K
April 4, 2027
Washington Park | Denver, CO

Greenland Trail Races

50K, 25K, 8M and 4M
May 1, 2027
Greenland Open Space | Larkspur, CO

Flamingo Day 5K

5K
June 6, 2027
Sloan’s Lake Park | Denver, CO

Cookie Chase

5K
July 10, 2027
Sloan’s Lake Park | Denver, CO