John Bryan State Park is located 3 mi (4.8 km) southeast of Yellow Springs, Ohio. Outcrops are highwall exposures of a gorge cut by the Little Miami River (Fig.1). Access to the two sections in John Bryan State Park is by foot trails on either side of the Little Miami River. The trails originate from the lower picnic area parking lot. A foot bridge spans the Little Mii 0.25 mi (0.4 km) east of the lower picnic area parking lot. The North Section is beneath a waterfall and in a stream bed 0.5 mi (0.8 km) east of the bridge along the north river trail, and the South Section is beneath a waterfall and in a stream bed 0.25 mi (0.4 km) east of the bridge along the south river trail. Locations are as follows: North Section, NW¼ SW¼ NW¼ Sec. 1, T.4, R.8; South Section, SE¼ NW¼ SE¼ Sec. 1, T.4, R.9; both sites on Clifton U.S.G.S. 7½-minute Quadrangle, Greene County, Ohio (Fig. 1).