Deep Lock Quarry is a Summit County Ohio Metro Park, located near Peninsula, Ohio. Ironically it sits in the middle of the Cuyahoga Valley National Park.
The park is named for the discarded millstones and building foundations that are found along the trail, which leads Deep Lock Quarry.
The lock is the deepest lock on the Ohio & Erie Canal, which the Towpath Trail runs beside. The time we were there we were fortunate enough to have the CVNP Train go by.