Heart of America Marathon
Race Day Weather
Warm start, rising temps ahead
Runners will face a starting temperature of 70°F, climbing to a maximum of 85°F by the finish. Winds from the ESE at 10 mph will create light headwinds and tailwinds throughout, but should not significantly impact performance. With humidity averaging 63%, it is advisable to start conservatively and increase hydration frequency as temperatures rise, especially in the later laps.
Pace Calculator
Enter a finish time to see what race day does to it.
Get forecast alerts for Heart of America Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Race Info
The Heart of America Marathon, established in 1960, is the second-oldest continuously running marathon in the United States. This challenging race features a 26.2-mile course that begins and ends at the Boone County History and Culture Center in Columbia, Missouri. Runners navigate approximately 5.5 miles of well-maintained gravel roads and trails, including the scenic Katy Trail along the Missouri River, and face the renowned Easley Hill. The event is known for its community-focused, low-frills atmosphere, emphasizing heat, hills, and humidity as integral parts of the race experience.
