Heartland - Cassoday, KS

OCT
9-11
2026
Traverse the vast Flint Hills tallgrass prairie on backcountry gravel roads. Choose from a range of distances, from a half marathon to a grueling 125-mile ultra. The event offers full support with aid stations and crew access points.
9-11 Oct 2026
100 kilometers Marathon Half Marathon

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Course Overview

The event features multiple distances run on backcountry gravel roads in the Flint Hills tallgrass prairie. The main 100-mile course is an out-and-back route with less than one mile of paved surface and approximately 6,000 feet of elevation gain. The event includes a 125-mile race, a 100K, a 50-mile race, a Marathon, and a Half Marathon.

Event Distances

  • 125 Miler
  • 100 Miler
  • 100K
  • Teter Rock 100K (includes a detour to Teter Rock)
  • 50 Miler
  • Marathon (point-to-point course)
  • 1/2 Marathon (out-and-back from Teterville Road aid station)

Logistics & Support

The event is based in Cassoday, Kansas. Packet pick-up and race briefings are held at the Cassoday Community Building. Aid station support is provided, with crew access available at specific locations for each distance. Drop bags are allowed at designated manned aid stations. A shuttle service is available for marathon participants returning from the Teterville Road aid station to Cassoday.

Rules & Requirements

All runners must carry a hydration device. Pacers are permitted from specific points in the longer races. Crews are not allowed on the course except at designated aid station access points. Littering is prohibited. Runners are responsible for the actions of their crew and pacers. There are cutoff times for each distance and aid station. Visit the organization's website for the most recent information.

100 km
Teter Rock 100k
100 km
100k
Marathon
Marathon
Half Marathon
1/2 Marathon
100 Miler
125 Miler
50 Miler