The main service the Belvidere and Delaware River Railway provided freight service south along the Delaware River from Phillipsburg, New Jersey to Milford, New Jersey, following a 16 mile riverbank line. The major industries along the line are lumber mills. Service is provided three days per week. Trains traveling to Milford were terminated in 2002 due to the competition of automobiles and poor track condition. Today, trains go as far south as Carpentersville.
The Belvidere and Delaware River Railway connects with Norfolk Southern in Phillipsburg, which provides connections to the national rail network. Commercial agreements also provide a connection with the Canadian Pacific Railway (CPRS) at Allentown, Pennsylvania. The B&DR is a Norfolk Southern Handling Line carrier, meaning Norfolk Southern haulage rates include delivery to B&DR customers by the B&DR. In 2004, the NYS&W Technical & Historical Society, in partnership with the B&DR began operating steam excursions between Phillipsburg and Carpentersville using former NYS&W 2-8-2 142. The 142 is an SY type 2-8-2 Mikado steam locomotive built by the Tangshan locomotive works in 1989 for the Valley Railroad in Essex Connecticut as Valley #1647, and was sold to the NYS&W Railroad in 1992. The locomotive was renumbered 142, and operated mainline excursions on the NYS&W. The locomotive was brought out of storage by the BDRV for use on the excursions in 2004.