Columbus:
Take Interstate 70 West to State Route 72 South. Take State
Route 72 South to State Route 343 West (you will see a sign for John Bryan
State Park) to State Route 370 South. State Route 370 dead ends into the
park.
Dayton:
Take Interstate 70 East to State Route 68 South. Take State Route 68 South to State
Route 343 East (There is a sign for John Bryan State Park) to State Route
370 South. State Route 370 dead ends into the park.
Cincinnati:
Take Interstate 75 North to Interstate 675 North.
Take
Dayton - Yellow Spring Road East (you will see a sign for John Bryan
State Park). The road dead-ends into State Route 68.
Take State Route 68 North to State Route 343 East to State Route 370 South.
State Route 370 dead ends into the park.