East Fork 100 mi/100K/50K/15 mi

The East Fork 100 mi/100K/50K/15 mi returns to Bethel, Ohio on September 12th, welcoming runners back for its fourth year in collaboration with Tri State Running Company. This event is unique as it offers the only 100-mile and 100-kilometer races within Southwest Ohio’s trail network. The race day starts at Park Road 2, where participants will begin their journey around William H. Harsha Lake in East Fork State Park.
On race morning, runners can expect to encounter firm yet slightly soft trails with a UV index of moderate levels. This setting provides both scenic beauty and a challenging course that traverses mountain bike paths, hiking routes, park roads, and the Steve Newman Worldwalker Perimeter trail. The atmosphere is one of anticipation as competitors prepare for an epic adventure through rolling terrain and picturesque landscapes.
East Fork races have become a local tradition since their inception in 2019, drawing runners from across Ohio and neighboring states to participate in this unique endurance event. Each year sees increased participation among both seasoned ultrarunners and novices eager to tackle the trails around William H. Harsha Lake. A portion of the proceeds benefits Tri State Running Company’s community initiatives.
The course for East Fork 100 mi/100K/50K/15 mi is a counterclockwise loop that encompasses approximately 33 miles, making it possible to complete three loops for the full marathon distance and two loops for the half. The route includes several creek crossings where runners can cool off during their run; these features are particularly appreciated in September when trails remain dry but still offer refreshing dips. Aid stations provide essential support along each loop.
Weather conditions typically see a firm yet slightly soft trail surface, with moderate UV exposure that requires sun protection for all participants. The temperature range is usually comfortable enough to allow runners to manage their hydration and nutrition needs effectively throughout the race duration.

The East Fork 100 mi/100K/50K/15 mi offers a variety of distances, including the challenging 160.9-kilometer (100-mile) course with a fee of $365.00; the equally demanding yet slightly shorter 100-kilometer race at $235.00; and for those seeking a more manageable challenge, both the 50K ($125.00) and the 15-mile run ($95.00). Each distance has its own unique set of challenges but shares the scenic beauty and rewarding experience that East Fork State Park offers.
To register for any of these distances, visit https://ultrasignup.com/register.aspx?did=132997. Registration fees are due by August 31st to secure your spot in this year’s event. Bib pickup will take place on September 8th and 9th at the Tri State Running Company headquarters located at 456 Main Street, Bethel, Ohio.
Race day starts promptly at Park Road 2 with all participants required to be present by their respective start times according to race distance categories. Age requirements are generally open but must adhere to park regulations for safety reasons. Newcomers should arrive prepared with appropriate gear including hydration packs and trail shoes suitable for varied terrain conditions.
The East Fork 100 mi/100K/50K/15 mi in Bethel, Ohio on September 12th is a significant event in the ultrarunning calendar that draws runners from across the region to test their endurance against challenging trails and serene natural landscapes. The commitment of participants and the community support make this race an essential part of Southwest Ohio’s running tradition.