Colorado Runner

Evening exercise impacts sleep for longer than previously thought

Dec 7, 2025 142

Dec 4, 2025 31

Dec 1, 2025 458

For a full list of race results, click here.

Ugly Sweater 5K

5K
December 21, 2025
Washington Park | Denver, CO

Donut Dash

5K
April 12, 2026
Washington Park | Denver, CO

Greenland Trail Races

50K, 25K, 8M and 4M
May 2, 2026
Greenland Open Space | Larkspur, CO
2026 RRCA National 50K Championship

Flamingo Day 5K

5K
June 7, 2026
Sloan’s Lake Park | Denver, CO

Cookie Chase

5K
July 11, 2026
Sloan’s Lake Park | Denver, CO

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