Ohio State Route 370 is a measly one-mile spur into John Bryan State Park, just east of Yellow Springs. The northern end of Ohio Route 370 is at Ohio Route 343, a mile east of Yellow Springs. From there, Ohio Route 370 heads south to end at the state park's entrance. This situation is east of Dayton, north of Xenia, and south of Springfield, in northern Greene County.
My photo of Ohio Route 370 comes from the northern end. I was driving to Columbus to kick off a trip to New England, when I took this photo in October 2015. Eastbound travelers on Ohio Route 343 will use this sign to locate the right turn onto Ohio Route 370, toward the entrance to John Bryan State Park.