The prettiest part of the Main D and R Canal towpath is between Millstone and Princeton. The towpath is located between the Millstone River and the canal; in some places the river and canal are less than fifty feet apart. This picture shows the lock at Griggstown.

In this area bicycling along the canal through the pretty towns of Griggstown and Blackwells Mill is especially pleasant. For some information on the towns and points of interest in this area go the home page of the D and R Canal State Park.