From their website...

http://www.cincinnati-oh.gov/cityparks/pages/-3440-/

...The park now features approximately 3 1/2 miles of nature trails, designated by the U.S. Department of the Interior as a National Recreation Trail. The earliest, the Ray Abercrombie Trail, was constructed by Hartwell Boy Scout Troop 14 in 1976. Additional trails were developed by Youth Conservation Corps summer work crews.

The Ravine Creek Trail follows a stream along most of the length of the park, until the stream empties into the Mill Creek. The trail then turns and parallels the Mill Creek for a short distance before climbing steeply back up to the Nature Center area. The natural springs that occur throughout the park add their seeping waters to the stream and are most easily seen along the lower portions of this trail.

The Ray Abercrombie Loop Trail on Second Ridge starts in a successional woods of old black locusts, young tulip trees and flowering dogwoods. Birds are plentiful along this more open part of the trail.

Further along, the woods change character abruptly, becoming an older forest dominated by maples on the southern side and beech on the northern side of the loop.

The Pawpaw Ridge Loop Trail circles the oldest forest in the park, a climax community of beech, tulip, maple and, of course, pawpaw trees....