100K Races in Ohio
As of October 22, 2026, Crewable lists 3 upcoming 100K races in Ohio from November 2026 to June 2027. The next is Conquer the Castle on November 7 in Mayfield. Registration is open for 1.
Sources: UltraSignup, RunSignUp, UTMB, race organizers and race websites
Race calendar
November 2026
1 raceMay 2027
1 raceJune 2027
1 raceQuick answers
What is the next 100K race in Ohio?
Conquer the Castle, on Saturday, November 7, 2026, in Mayfield. Distances: 100K, 50K, 20 mi.
How many 100K races in Ohio have open registration?
1 of the 3 list registration as open as of October 22, 2026, including Conquer the Castle.
What is the busiest month for 100K races in Ohio?
November 2026, with 1 of the 3. May 2027 follows with 1.
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