Freehold sits about an hour south of New York City by car on the Garden State Parkway — take exit 123 and follow Route 9 south, then Route 33 west into town. Traffic can add time on weekends, particularly in summer.
NJ Transit operates a bus service from the Port Authority Bus Terminal in Midtown Manhattan to Freehold, with the 139 route making the trip in roughly 90 minutes depending on traffic. Fares are reasonable and buses run throughout the day, making a day trip from the city very manageable. There is no train service directly to Freehold; if you're coming by rail, the closest station is on the North Jersey Coast Line at Aberdeen-Matawan, about 15 miles north.