Half Marathons in Missouri
Missouri has 14 upcoming half marathons scheduled for 2026. Parkville is the busiest city with 3 races, ahead of St. Louis (2) and St Charles (1).
Showing all 14
Running
Heatwave Half Marathon - Kansas City
Kansas City, MO
Running
Heatwave Half Marathon - Kansas City
August 8, 2026
Kansas City, MO
Running
Hearts for RMHKC Half Marathon,10K, 5K, 1 Mile Walk, & Kid's Fun Run
August 16, 2026
Parkville, MO
Running
Golden Harvest Half Marathon & 5k/10k - Springfield
September 12, 2026
Springfield, MO
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.