• BE ADVISED: The Delaware River Joint Toll Bridge Contractor will begin the demolition of the I-95/I-295 bridge structure over the D&R Canal and Tow Path. This work is scheduled to begin on November 26th. For safety reasons they will be closing the tow path during the entire demolition period which is anticipated to last for 6 weeks. Park visitors will NOT be permitted access to the path between Bernards Drive and Upper Ferry Road in Ewing Township, Mercer County.

  • BE ADVISED: Swimming in the Delaware and Raritan Canal is a prohibited activity. As per NJ State Park Service Rules and Regulations swimming may take place ONLY IN A DESIGNATED SWIM AREA. In recent years, illegal swimming activity has increased in the Prallsville Mills area of Stockton in both the Canal and historic lock. This area is fenced and posted. This is considered a RECKLESS ACTIVITY and in violation of the New Jersey Administrative Code. Increased park police patrols have been instituted and VIOLATORS WILL BE SUMMONED.

  • BE ADVISED: A dredging project is planned for the D & R Canal from Kingston to Amwell Road at East Millstone. This extensive project (administered by NJ Water Supply Authority), is slated to begin in the July 9, 2018 and may take up to three years to complete. Click here for details about this project.
    photo-Preparing for dredge operations

  • HYDRILLA UPDATE: Hydrilla was discovered in the Washington Crossing section of the Canal in July 2016. Hydrilla is an extremely aggressive invasive aquatic plant that spreads very rapidly and forms dense mats that can choke the flow of water through the canal. A lake management firm was hired in September, 2016 to survey, assess, and map the extent of hydrilla and other problem weeds in the high-priority segments of the Delaware & Raritan Canal. The survey report indicates that, for the 18.31 miles surveyed, submerged aquatic vegetation was collected at 96 percent of the sites, confirming the spatial extent and diversity of vegetation in the Canal. Hydrilla was observed at 56 percent of the survey sites.

    On May 31, 2017, the Authority began a low-dose (<4 ppb) herbicide injection of Sonar Genesis for up to 120 days targeting the hydrilla and other nuisance aquatic vegetation. At these low rates, there are no restrictions on fish/fish consumption, human/animal water consumption or contact. There are some recommended water irrigation usage restrictions that have been posted along the tried areas of the canal. All Canal water customers have been engaged in the management planning process and continue to be updated on the status of treatment. The herbicide application is showing promising signs of effectively controlling the Hydrilla and other nuisance aquatic plants. The Authority and consulting firm are monitoring the status of plants and the herbicide concentrations at several points along the Canal. For monitoring and project information, please visit

  • BE ADVISED: The State Forest and State Park Services have identified the D&R Canal State Park as a high-use area for the preemptive felling of ash trees to reduce the anticipated hazards caused by the Emerald Ash Borer infestation effecting the State. At-risk, dying and dead ash trees will be harvested along the path. These areas will be replanted with new seedlings. It is estimated that approximately 1,550 trees, 5-inches or more in diameter, leaning over or located with 15 feet of the path will be felled. Click here for more information on the Emerald Ash Borer and the progress of the project here at D&R Canal State Park. Thank you for your patience.

  • PLEASE NOTE: Park users, campers, hunters and all visitors to the D&R Canal State Park are asked to call 1-877-WARNDEP if they require the assistance of our State Park Police. Please do not hesitate to call AT ANY TIME if assistance is needed. In the event of a life threatening emergency we ask that you please call 911. And as always, we ask that the public contact our office to report any fallen trees or other obstructions encountered along the length of the path. ENJOY THE PARK AND BE SAFE!

  • Thanks to the volunteer work done by JORBA, we are happy to offer our park users a TRAIL MAP FOR THE SIX MILE RUN RESERVOIR SITE. Click here to view and download your personal copy. Click here to read more about the expanded trail network at Six Mile Run and JORBA's volunteer involvment.

    Main Park Office
    D&R Canal State Park
    145 Mapleton Road
    Princeton, NJ 08540
    Phone: (609) 924-5705

    Bull's Island Recreation Area
    and Campground

    2185 Daniel Bray Highway (Route 29)
    Stockton, NJ 08559
    Phone: (609) 397-2949

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