The East Branch Delaware River, approximately 75 mi (120 km) long in the U.S. state of New York, is one of two branches, along with the West Branch, that join form the Delaware River. It flows through a mountainous area on the northern edge of the Catskill Mountains.
It rises in eastern Delaware County and flows initially SSW, through Roxbury, then WSW through Margaretville, forming part of the northern boundary of Catskill State Park. East of Downsville it is impounded to form the 8 mi (13 km) Pepacton Reservoir. It receives the Beaverkill River from the southeast at East Branch. It joins the West Branch at Hancock, on the border with Pennsylvania, to form the Delaware.
The Beaverkill River is a tributary of the EastBranchDelawareRiver, approximately 44 mi (70 km) long, in the U.S. State of New York.
The river has been popular as a trout stream since the early 19th century, when it became one of the first resort destinations in the United States.
The subsequent depletion of the brook trout population by the 1850s led to an early conservation movement to preserve the river, including the introduction of hatcheries for brown trout.