The Big Deal At Great Seal

MAY
1
2027
Multi-distance trail event at Great Seal State Park featuring a rugged 20-mile single-track loop, multiple aid stations, pacer and crew rules, and a 100-mile 36-hour cutoff.
Sat 1 May 2027
100 miles 100 kilometers 20 miles 5 kilometers

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The Big Deal at Great Seal

The event at Great Seal State Park in Chillicothe, OH offers multiple distances on a primarily single-track trail course organized by RunFluent. The main circuit is a roughly 20-mile loop used repeatedly for longer distances. Each loop now has about 3100–3200 feet of elevation gain, and the course is approximately 95% single track and 5% dual track.

Distances:

  • 100 mile five laps of the 20 mile course
  • 100k three laps plus a 2 mile finishing loop
  • 20 Miler one lap
  • Adult 5k single loop
  • 5k YOUTH single loop

The course includes a variety of named trail features and sections, and the initial loop contains the Sugarloaf climb while later loops bypass that climb. A previously used Shrake Road section has been removed for safety, which increases the amount of two-way traffic on some sections by about one mile.

Aid is provided at five stops on the 20-mile loop, with locations at the start/finish (Ireland Shelter), Rocky Road, and Lick Run. Crew access is allowed only at Ireland Shelter and Lick Run; crew contact at Rocky Road or other on-course locations is not permitted except in emergencies. Pacers are permitted for 100k and 100 mile entrants after the first lap, with one pacer at a time; pacers must be registered and use designated access points.

The 100 mile event has a total cutoff of 36 hours, and runners must begin their final lap within 28 hours. Mandatory on-person gear for 100 mile and 100k participants includes a GPX file, two headlamps or equivalent backup, a whistle, an emergency foil blanket, at least 1 L carrying capacity for water, and a collapsible cup. Drop bags and aid station procedures, finisher awards, and a no-refund with deferral policy are specified by the organizer. Visit the organization's website for the most recent information.

100 mi
100 Mile
100 km
100k
20 mi
20 Miler
5 km
5k Youth
5 km
Adult 5k

Events nearby

A Spartan style endurance race in Hocking Hills covering over 4 miles with 20 plus obstacles, mud and water. Individual, group and 5 person team entries are available and the event is recommended for ages 15 and up.
A trail event in Laurelville with 50K, 25K, 10K (now 7.3 miles) and a youth 10K, featuring a mostly trail 25k course and participant awards.
A limited access 100 percent trail 12 hour race and 7K in Chillicothe OH; the RunFluent Ohio Trail Series finale on Oct 17 2026.
A team relay in Chillicothe, Ohio on April 16 and 17, 2027 featuring trail miles with hills and varied terrain. Race profits support local Drug Free Clubs of America chapters and registration is capped at 150 teams.
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