East Fork - Bethel

SEP
12
2026
Tackle the only 100-mile and 100K races in Southwest Ohio on a scenic loop around William H. Harsha Lake. This cupless ultramarathon offers four distances on rolling trails with creek crossings and beautiful views. All finishers receive awards, with 100-mile finishers earning a belt buckle.
Sat 12 Sep 2026
100 miles 100 kilometers 50 kilometers 15 miles

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Event Overview

The East Fork 100 mi/100K/50K/15 mi is an ultrarunning event held at East Fork State Park in Bethel, Ohio. It is the only 100-mile and 100-kilometer race in the Southwest Ohio area.

Race Distances and Course

The event offers four distances:

  • 100 miles
  • 100 kilometers
  • 50 kilometers
  • 15 miles

The main course is a roughly 33-mile loop around William H. Harsha Lake, utilizing mountain bike trails, hiking paths, the Steve Newman Worldwalker Perimeter trail, and a small amount of park road. The terrain is rolling with creek crossings and features lake views, single-track trails, a waterfall in a pine forest, and open fields. Distances are completed by running multiple loops: three for the 100-mile, two for the 100K, and one for the 50K. The 15-mile race is an out-and-back on the same trails to the first manned aid station. Visit the organization's website for the most recent information.

Key Information

  • Cutoffs: A 40-hour overall cutoff applies to the 100-mile, 100K, and 50K races. The 15-mile race has a 12-hour cutoff. Specific intermediate cutoffs are in place for the longer distances.
  • Aid Stations: The course features multiple fully manned and unmanned water-only stations. Crew access is permitted at designated aid stations for 100-mile and 100K runners. Pacers are allowed for these distances starting with the second loop.
  • Cupless Event: Runners must carry their own bottles or bladder and a reusable cup for drinks at aid stations.
  • Mandatory Gear: Required items include a light with spare batteries, a cell phone, a container for at least 1 liter of liquid, and an emergency rain jacket.
  • Swag & Awards: All entrants receive high-quality swag. Finishers receive a finisher award, with 100-mile finishers receiving a belt buckle.
  • Packet Pickup: Available at the start/finish area the day before and the morning of the event.
100 mi
100 Miler
100 km
100k
50 km
50k
15 mi
15 Miler