Race Calendar in Colorado, United States

Avery Brewing Co. 4K on the 4th

Boulder, Colorado, United States

Jul 4, 2026 (Sat)

Running

4K

July 4th Run 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

Jul 4, 2026 (Sat)

Running

5K 10K Half-Marathon 1.6K +2

4th of July Donut Hole Mile

Arvada, Colorado, United States

Jul 4, 2026 (Sat)

Running

1.6K

July Virtual Run - Denver

Denver, Colorado, United States

Jul 3, 2026 (Fri) – Jul 6, 2026

Running

5K

July Virtual Run - Colorado Springs

Colorado Springs, Colorado, United States

Jul 3, 2026 (Fri) – Jul 6, 2026

Running

5K

Miles for Hope

Canon City, Colorado, United States

Jul 1, 2026 (Wed) – Jul 31, 2026

Howelsen Hustle

Steamboat Springs, Colorado, United States

Jul 1, 2026 (Wed)

Mountain biking, Trail running

8K 4.8K 1.6K 25.7K +5

Denver Rotary Club Cycling to Serve 2026

Denver, Colorado, United States

Jul 1, 2026 (Wed) – Oct 31, 2026

Wednesday Worlds Pulpit Rock UCCS

Colorado Springs, Colorado, United States

Jul 1, 2026 (Wed)

Mountain biking

4.8K 9.7K 14.5K

Tunnel to Towers National Golf Series Northern Colorado Golf Classic

Windsor, Colorado, United States

Jun 29, 2026 (Mon)

Blue Sky Ascent & Round Trip (formerly the Mt. Evans Ascent)

Idaho Springs, Colorado, United States

Jun 28, 2026 (Sun)

Running

23.3K 46.7K

Cade’s Cause: Concussion & CTE Awareness Run/Walk

Littleton, Colorado, United States

Jun 28, 2026 (Sun)