High Quality Content by WIKIPEDIA articles! State Route 370 (SR 370, OH 370) is 1.21-mile (1.95 km) long north–south state highway in the western part of the U.S. state of Ohio. The highway runs from its southern terminus at the main entrance to John Bryan State Park nearly 2 miles (3.2 km) southeast of Yellow Springs to its northern terminus at SR 343 about 0.75 miles (1.21 km) east of Yellow Springs.