The 70-mile Delaware and Raritan Canal State Park is one of central New Jersey's most popular recreational corridors for canoeing, jogging, hiking, bicycling, fishing and horseback riding. The canal and the park are part of the National Recreation Trail System. This linear park is also a valuable wildlife corridor connecting fields and forests. The D&R Canal parallels Lake Carnegie and provides easy access from campus for walking, running, and biking both north and south.

The D&R Canal is often referred to as "The Towpath" in reference to its history when mule teams owed barges of goods in the canal. The Towpath runs parallel to Lake Carnegie in Princeton and is accessible from Alexander Road, Washington Road and Harrison Street.

For Princetonians it's a great resource for walking, running and biking right next to campus.