The Big Deal At Great Seal

Chillicothe, United States • 2 May 2026

The Big Deal at Great Seal is a challenging running event held at Great Seal State Park in Chillicothe, Ohio. The race features multiple distances including a 100-mile ultra, 100k, 20-mile, adult 5k, and a 5k youth run. The course consists of a 20-mile loop primarily on single-track trails with two road crossings, offering approximately 2,700 feet of elevation gain per loop. This event aims to bring back a 100-mile race to the area, promising a rugged and scenic trail experience. It is designed for endurance runners seeking a demanding and well-organized ultra running challenge. Visit the organization's website for the most recent information.

Race information

100 mi
100 Mile
100 km
100k
20 mi
2700 m+
20 Miler
5 km
5k Youth
5 km
Adult 5k
Visit the organization's website for the most recent information.
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