Races in Colorado, United States

October

• Oct 25 Ghosts and Goblins 10K (5 km) Denver · 5K 5K
• Oct 25 The 14th Annual Odyssey Odyssey - 2026 (1 Miles) Denver · 1 Mile 1 Mile
• Oct 25 Ghosts and Goblins 10K (10 km) Denver · 10K 10K
• Oct 31 Foundry Halloween Run (5 km) Steamboat Springs · 5K 5K
• Oct 31 I Ain't Scared (of 5k) (3.1 Miles) Thornton · 5K 5K
• Oct 31 Colleen De Reuck XC Classic (5K) Boulder · 5K 5K
• Oct 31 Zombie Fun Run 5k & 1mile (1 Miles) Idaho Springs · 1 Mile 1 Mile
• Oct 31 Spooky Sprint - Colorado Springs (13.1 Miles) Colorado Springs · Half Marathon Half Marathon
• Oct 31 PB&J Fuel Run 5K/10K/13.1 DENVER/AURORA (10K) Centennial · 10K 10K
• Oct 31 PB&J Fuel Run 5K/10K/13.1 DENVER/AURORA (13.1 Miles) Centennial · Half Marathon Half Marathon
• Oct 31 Spooky Sprint - Colorado Springs (6.2 Miles) Colorado Springs · 10K 10K
• Oct 31 HRCA Backcountry Wilderness Half Marathon Lone Tree · Half Marathon Trail Half Marathon
• Oct 31 Colleen De Reuck XC Classic (1K) Boulder · 1K 1K
• Oct 31 Colleen De Reuck XC Classic (3K) Boulder · 3 km 3 km
• Oct 31 Halloween 5K Fundraiser! (3.1 Miles) Grand Junction · 5K 5K
• Oct 31 Spooky Sprint - Colorado Springs (3.1 Miles) Colorado Springs · 5K 5K
• Oct 31 PB&J Fuel Run 5K/10K/13.1 DENVER/AURORA (5K) Centennial · 5K 5K
• Oct 31 PB&J Fuel Run 5K/10K/13.1 DENVER/AURORA (1 Miles) Centennial · 1 Mile 1 Mile
• Oct 31 Zombie Fun Run 5k & 1mile (5K) Idaho Springs · 5K 5K
• Oct 31 Halloween Fun 5k (3.1 Miles) Steamboat Springs · 5K 5K