Vly Mountain is a mountain located in the town of Halcott, New York, United States in Greene County. The mountain is part of the Catskill Mountains. Vly Mountain is flanked to the northwest by Bearpen Mountain, to the east by Vinegar Hill, to the northeast by Kipp Hill, and to the southeast by Beech Ridge.

Vly Mountain
Summit, with canister attached to tree
Highest point
Elevation	3,529 ft (1,076 m) NGVD 29[1]
Prominence	649 ft (198 m)[1]
Listing	Catskill High Peaks 33rd
Coordinates	42°14.75′N 74°26.90′W / 42.24583°N 74.44833°W / 42.24583; -74.44833
Geography
Vly Mountain Location of Vly Mountain within New York Show map of New York Vly Mountain Vly Mountain (the United States) Show map of the United States
Location	Halcott, Greene County, New York
Parent range	Catskill Mountains
Topo map	USGS West Kill

The north side of Vly Mountain drains into Little West Kill, thence into Schoharie Creek, the Mohawk River, the Hudson River, and into New York Bay. The east side of Vly Mtn. drains through Roarback Brook into the West Kill, thence into Schoharie Creek. The south and west sides of Vly Mountain drain into Vly Creek, thence into Bush Kill, Dry Brook, the East Branch of the Delaware River, and into Delaware Bay.