The Delaware River, or Big "D," is located in the South Central part of New York State on the Pennsylvania border.   It has a rich fly-fishing history and a reputation for being one of the best wild trout fisheries in the world.  The cold water from the Cannonsville and Pepacton reservoirs, accompanied by the abundance of insects and wild trout, make this river a "must visit" for all fly fishermen. From the 1870s through the mid-1900s, the Delaware River was known for its outstanding small-mouth bass fishing.  There are several different stories about just how the Delaware River's amazing rainbow trout population began. The most memorable one was the tale of an Erie train that was carrying cans of rainbow trout to stock the cool waters of the West Branch.  According to the story, there was a train wreck and in a plight to save the fish on board, they were dumped into Callicoon Creek. Despite any of these "tall tales," in the 1880s, rainbows were stocked into small feeder streams on the Delaware in both New York and Pennsylvania, where they thrived for more than 80 years. The Delaware River wasn't known for its trout fishing until the l960s.  In l961, the Pepacton Dam was built in Downsville on the East Branch, which took over most of the down-stream releases from the other rivers.  These were bottom releases,  making some 45 miles of the river cold enough for trout. This cold-water zone extended all the way down to Long Eddy on the main stem.