Fort St. Marys

Historical marker location:

St. Marys, Ohio

( Marker is on Herzing Street, 0.2 miles east of South Main Street (Ohio Route 66), on the left when traveling east.)

Marker installed: 1974

The Ohio River, which forms the state's southern border, played a significant role in the Underground Railroad, a network of secret routes and safe houses used by African American slaves to escape to freedom in the North before the Civil War.