Marathon races in Colorado

Looking for marathons near you in Colorado? There are 7 upcoming marathons listed here. The next one is Bound for Boston Marathon & Half Marathon - Denver on Sun, Aug 2, 2026 at Northfield High School — see the full list below for dates, venues, and registration links, and browse marathons in other cities.

All 5K (150) 10K (70) Half Marathon (56) Marathon (7) Trail Run (12)

Sun, Aug 2, 2026 Bound for Boston Marathon & Half Marathon - Denver Northfield High School · Denver, CO · From $45 5K10KHalf MarathonMarathon Road
Sat, Aug 22, 2026 Staunton Rocks! Marathon and Half Marathon 12102 S Elk Creek Rd · Pine, CO · From $90 5K10KHalf MarathonMarathon Road
Sun, Sep 27, 2026 Boulder Marathon Boulder Reservoir Marathon Road
Sat, Dec 12, 2026 Sunrise Marathon 5K/10K/13.1 DENVER/AURORA Piney Creek Hollow Park (Course Map will be emailed) · Centennial, CO · From $30 5K10KHalf MarathonMarathon Road
Sat, Jan 16, 2027 Sunrise Marathon 5K/10K/13.1 DENVER/AURORA Piney Creek Hollow Park (Course Map will be emailed) · Centennial, CO · From $30 5K10KHalf MarathonMarathon Road
Sat, Mar 20, 2027 Sunrise Marathon 5K/10K/13.1 DENVER/AURORA Piney Creek Hollow Park (Course Map will be emailed) · Centennial, CO · From $30 5K10KHalf MarathonMarathon Road
Sun, May 2, 2027 Colorado Marathon Poudre Canyon · Fort Collins, CO 5K10KHalf MarathonMarathon Road

Quick answers

When is the next marathon in Colorado?

The next Marathon in Colorado is Bound for Boston Marathon & Half Marathon - Denver on Sun, Aug 2, 2026 at Northfield High School.

How many marathons are coming up near me in Colorado?

There are currently 7 upcoming marathons listed in Colorado, each with a date, venue, and direct registration link.

What's the cheapest Marathon in Colorado?

The lowest listed entry right now is Sunrise Marathon 5K/10K/13.1 DENVER/AURORA at from $30. Registration prices usually rise as race day nears, so early entry is cheapest.