Heartland - Cassoday, KS

Heartland : October 10–12, 2025, Cassoday, KS

Heartland is a multi-distance ultrarunning event in Cassoday, Kansas. Distances offered include:

• 125 Miler
• 100 Miler
• 100K
• Teter Rock 100K
• 50 Miler
• Marathon
• 1/2 Marathon

The main courses are out-and-back routes on backcountry gravel and dirt roads with less than one mile of paved surface on the 100-mile course. Much of the route runs through open range and the Flint Hills tallgrass prairie. The 100-mile course includes rolling hills and about 6,000 feet of total climb. The 125-mile route begins on the Heartland 100 course and adds a roughly 30-mile loop to Eureka. The Teter Rock options include a detour to Teter Rock and return.

Aid, logistics and rules

Aid and support: the 100-mile race uses 22 aid stations; the 125-mile adds a roving/mobile aid station. The 100K has 14 aid stations, the 50-mile 12, and the marathon 6. Crew access and drop-bag allowances vary by distance and aid station. Pacers are allowed from Matfield Green to the finish; only one pacer may accompany a runner at a time.

Time limits and safety: time limits include a 38-hour limit for the 125-mile, and 30-hour limits for the 100-mile and 100K. The 50-mile has a 15-hour limit with an intermediate 7-hour turnaround cutoff. The course is remote; local EMS will be used for medical emergencies. Race rules prohibit dogs on the course, require visible race numbers and hydration devices, forbid littering, and make runners responsible for their crews. Live external tracking is not provided; runners are tracked through manned aid stations and radio communications. Visit the organization's website for the most recent information.