Marathon races in Denver–Boulder, CO
Looking for marathons near you in Denver–Boulder, CO? 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.
- Sun, Aug 2, 2026 Bound for Boston Marathon & Half Marathon - Denver 5K10KHalf MarathonMarathon Road
- Sat, Aug 22, 2026 Staunton Rocks! Marathon and Half Marathon 5K10KHalf MarathonMarathon Road
- Sun, Sep 27, 2026 Boulder Marathon Marathon Road
- Sat, Dec 12, 2026 Sunrise Marathon 5K/10K/13.1 DENVER/AURORA 5K10KHalf MarathonMarathon Road
- Sat, Jan 16, 2027 Sunrise Marathon 5K/10K/13.1 DENVER/AURORA 5K10KHalf MarathonMarathon Road
- Sat, Mar 20, 2027 Sunrise Marathon 5K/10K/13.1 DENVER/AURORA 5K10KHalf MarathonMarathon Road
- Sun, May 2, 2027 Colorado Marathon 5K10KHalf MarathonMarathon Road
New to the distance? Read the best fall marathons, or set your target with the pace chart.
Racing a Marathon in Denver–Boulder?
Get new Denver–Boulder marathons twice a month, plus a heads-up before registration prices jump.
Quick answers
When is the next marathon in Denver–Boulder?
The next Marathon in Denver–Boulder, CO 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 Denver–Boulder?
There are currently 7 upcoming marathons listed in Denver–Boulder, CO, each with a date, venue, and direct registration link.
What's the cheapest Marathon in Denver–Boulder?
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.