Half Marathons in Colorado
Colorado has 22 upcoming half marathons scheduled for 2026. Colorado Springs is the busiest city with 5 races, ahead of Littleton (2) and Estes Park (1). The list includes Bound for Boston Marathon & Half in Denver on August 2 — Boston-qualifier marathon and half marathon.
Showing all 22
Running
Heatwave Half Marathon - Colorado Springs
Colorado Springs, CO
Running
Heatwave Half Marathon - Colorado Springs
July 16, 2026
Colorado Springs, CO
Running
Golden Harvest Half Marathon & 5k/10k - Colorado Springs
September 6, 2026
Colorado Springs, CO
Running
Running for Children's Rights to Both Parents - 9 of 50 Half Marathons in 50 States - Colorado
September 27, 2026
Boulder, CO
Running
50 States Half Marathon Club General Membership
February 10, 2034
Colorado Springs, CO
Running
Fifty States Half Marathon Club Life Membership
February 11, 2034
Colorado Springs, CO
Top Cities for Half Marathons in Colorado
Frequently asked questions
How long is a half marathon?▾
A half marathon is 13.1 miles (21.1 kilometers). It is one of the most popular race distances in the US, attracting over 2 million finishers annually. Browse half marathons on RACE to find one near you.
How should I train for my first half marathon?▾
Most beginner training plans are 10-12 weeks long and gradually build your weekly mileage. A typical plan includes 3-4 runs per week with one long run that peaks around 10-11 miles before race day.
What is a good half marathon time?▾
The average US half marathon finish time is about 2 hours 10 minutes. Beginners often aim for under 2:30, while competitive runners target sub-1:45. Focus on finishing strong rather than a specific pace for your first race.
What are the biggest half marathons in the US?▾
The largest include the United Airlines NYC Half, RBC Brooklyn Half, Disney Princess Half Marathon, and the Rock 'n' Roll series events in Las Vegas, Nashville, and San Diego. You can find all of these on RACE.