Sourland Mountain Nature Preserve
From the Flemington Area Take Route 202/31 south from the Flemington Circle for 5 miles to the jug handle for Wertsville Road (Route 602). Use the traffic light to cross over Route 202/31. Continue on Wertsville Road for 3.3 miles to Rileyville Road (Route 607). Turn right onto Rileyville; go 1.7 miles. The park entrance is on the left and is marked by a Green Acres sign as well as a County Park sign. Two other driveways share the entrance; continue up the center driveway to the small parking area. Do not block the gated access road.
For electronic navigation and mapping -- GPS Coordinates: 40.420840, -74.789335 (233 Rileyville Rd, Hopewell, NJ 08525)
The former site of a quarry processing large boulders -- now with four hiking trails
From the small parking area, the one-mile Service Road Trail, a woods road, follows a mostly level route into the boulder-strewn forest, passing a swamp along the way. The short South Loop Trail, which crosses a stream twice, can be used as an alternate route for part of the way on the return. Total trails: four
Use the Web Map link on this site for a trail map.
Formerly the site of a quarry for large boulders, called diabase or "trap rock," which were crushed to obtain railroad ballast, concrete aggregate, and surfacing for roadbeds. The park is now covered by a second-growth oak forest.