The Delaware and Raritan hasn’t been a working canal since the 1930s, but it’s still earning its keep as a very long state park. AS American canals go, the Erie, which famously linked Buffalo to Albany in the early 19th century, gets all the glory. But at its peak in the 1860s, the V-shaped Delaware and Raritan Canal running through central New Jersey was no pipsqueak transportation system. One year it even outdid the Erie in tonnage carried. And since the early 1970s the narrow waterway has been the centerpiece of a 70-mile-long state park popular with bikers, walkers, fishermen and boaters.
See full NY Times July 29, 2010 article.