Blackhead is flanked to the northeast by Black Dome and Acra Point is located north.

Blackhead stands within the watershed of the Hudson River, which drains into New York Bay.

The north side of Blackhead drains into the headwaters of Batavia Kill, and thence into Schoharie Creek.

The east side of Blackhead drains into Trout Brook, thence into Shingle Kill, Catskill Creek, and the Hudson River.

This article about a location in Greene County, New York is a stub.