Colorado Runner

BOLDERBoulder Co-Founder Steve Bosley Named to Colorado Sports Hall of Fame Class of 2027

Oct 19, 2026 5

Oct 17, 2026 33

Oct 15, 2026 541

For a full list of race results, click here.

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

Labor Day Half Marathon

Half Marathon, 10K and 5K
September 6, 2027
Salisbury Park | Parker, CO