26 runs, swims, rides and races in Colorado

From city marathons to local trail runs—find marathon events in cities and communities throughout Colorado.

• Aspen (3)
• Boulder (1)
• Breckenridge (1)
• Centennial (2)
• Colorado Springs (2)
• Denver (2)
• Durango (1)
• El Paso County (2)
• Fort Collins (3)
• Grand Junction (1)
• Leadville (1)
• Littleton (1)
• Longmont (1)
• San Juan County (1)
• Steamboat Springs (2)
• Thornton (2)

Regional Clubs & Organizations