The longest completed section of the Raritan River Greenway is three miles (5 km) long and runs from a hill near Red Oak Way in Bridgewater to Nevius Street in Raritan. The hill at an elevation of seventy feet has a nice view of south side of the Raritan River.

The dirt path from the top of the hill to a small parking lot (at the driveway for the Sellars Maintenance Facility on Old York Road) is part of county property that is undeveloped. Through the fence of the parking lot is the developed part of the trail, beginning as a gravel pathway bound by the Raritan Water Power Canal and the Raritan River.

This part of the trail is in Duke Island Park in Bridgewater. Less than a quarter mile east, a paved bicycle path begins, which ends near an old railroad bridge near Woodmere Street. The gravel and dirt foot path continues along the canal and meets up with the bicycle path again near the old railroad bridge.

The dirt pedestrian path continues on the much narrower strip of land between the canal and river until it reaches a small foot bridge at the end of Canal Street in Raritan. A new pedestrian bridge further west on Old York Road has been installed with parking provided for further access to the greenway.

After reaching Raritan center, the greenway continues across a mowed field without a trail and under a tunnel beneath the Lyman Street Bridge. On the south side of the Lyman Street Bridge is a small sign with some history of the Raritan Power Canal. The Nevius Street Bridge, where the trail currently ends can be crossed by pedestrians and bicyclists into Hillsborough. Source: Wikipedia.