Heartland - Cassoday, KS

Cassoday, United States • 9-11 Oct 2026

Heartland - Cassoday, KS

Heartland is a multi distance ultrarunning event near Cassoday, Kansas that runs mainly on backcountry gravel and dirt roads. The original 100 mile route contains less than one mile of paved surface. Much of the course travels open range and Flint Hills tallgrass prairie with wide views; the 100 mile course includes rolling hills and about 6,000 feet of climb.

Distances offered:

  • 125 Mile
  • 100 Mile
  • 100K
  • Teter Rock 100K
  • 50 Mile
  • Marathon
  • Half Marathon

Most races are out and back; the 125 Mile begins on the Heartland 100 course and includes a 30 mile loop to Eureka. The Cassoday marathon is point to point with a 1.2 mile loop in Cassoday. The Teter Rock half and 100K routes use Teterville Road as a turnaround or aid station point. The 125 Mile option has limited course marking on the extra loop and a roving aid station through the first night.

Support logistics include multiple manned aid stations, additional roving aid for the 125 Mile, crew access points, and drop bag locations. Pacers are allowed from Matfield Green to the finish under specified rules. Cutoff and time limits apply per distance. Parking at the community building is limited and camping options are available nearby. October weather can vary; historic normals show mild days and cool nights and very limited shelter exists on the course. Visit the organization's website for the most recent information.

Race information

125 mi
125 Miler
100 mi
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.
Trail runs nearby

A chip timed 5K trail run and walk at Grace Hill Winery in Whitewater, KS on April 26, 2026, that includes a post race wine pour, race shirt, commemorative glass, food and live music.

An ultrarace in Cassoday, Kansas offering 25K, 50K and 50 mile out and back routes on gravel roads through the Flint Hills. Manned aid stations, drop bags, and specific crew access points are provided; pacers and dogs are not allowed.