The Omick Woods at Rocktown Preserve, in East Amwell, is at the western end of the Sourland Region, a 20-mile forested ridge stretching from Duke Farms in Somerset County to Lambertville in Hunterdon. The diabase rock underlying the ridge is an extension of the New Jersey Palisades across the Hudson River from New York City.
The Rocktown Preserve trail makes a 1.5 mile loop, with a stem from the parking lot crossing small Back Brook on a wooden bridge to a junction where the trail goes east or west. The eastern side of the loop has two stone crossings of the brook, reaching a high overlook with a broad view to the north over the Amwell Valley, and the southern edge of the Hunterdon plateau on the horizon. Heading southwest, the trail descends to an interesting side spur onto an old dam, ending with a view down to the brook that now cuts through the breach in the dam. From the entrance to this spur, the main trail continues generally south to the junction at the wooden bridge.