I-75 to Bowling Green; Rt.6 west to Wapakoneta Rd.; turn north towards Grand Rapids; turn west on West 2nd St; follow SR65 to Mary Jane Thurston park on right; first entrance is day area (main stage); second entrance is camping;

or 

475/23 to exit for US 24, go west (towards Napoleon), about 15 miles, turn south on SR 578, cross Maumee River; go west on SR65, about 3/4 mile to park.