The Fire House is slightly north of Washington Crossing State Park on the New Jersey side of the Delaware River.
From the south:
Take Route 29 north through Trenton, or.
From Pennsylvania (US Route 1) take 1-95 North. In New Jersey it's I-95 South, exiting onto Scotch Road. Turn left at the traffic light on Washington Crossing-Pennington Road, and right onto Route 29 at the Washington Crossing State Park traffic light.
From the north:
Take Route 29 south from Lambertville.