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Heartland - Cassoday, KS

Cassoday, United States • 10-12 Oct 2025

The Heartland event in Cassoday, Kansas, is a challenging ultra-running race featuring multiple distances: 125 miles, 100 miles, 100K, Teter Rock 100K, 50 miles, marathon, and half marathon. The course primarily follows backcountry gravel roads with minimal paved sections, winding through the scenic Flint Hills tallgrass prairie with rolling hills and about 6,000 feet of elevation gain on the 100-mile route. The 125-mile race includes a 30-mile loop to Eureka, KS.

Aid stations and crew access points are strategically placed, supporting runners throughout. The event celebrates its 25th anniversary with special finisher rings and awards. It offers a rugged, remote atmosphere ideal for experienced ultra runners. Visit the organization's website for the most recent information.

United States Kansas Cassoday

Race information

Website Registration
125 mi
6000 m+
125 Miler
100 mi
6000 m+
100 Miler
100 km
Teter Rock 100k
100 km
100k
50 mi
50 Miler
26 mi
Marathon
13 mi
1/2 Marathon
Visit the organization's website for the most recent information.
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