Situated at the extreme northern end of the Taconic Mountain Range, Bomoseen and Half Moon State Parks provide a mosaic of forest, water, and open land within their nearly 3,000 acres.
The terrain is dominated by a series of north-south ridges clothed with hemlock and white pine. Other areas include oaks and hickories, occasionally with a grassy understory or savannah. Water is found throughout the property in a series of scattered small remote ponds, large wetlands, and the 202-acre Glen Lake with its nearly undeveloped shoreline. Several open fields and clusters of apple trees can be seen along the Moscow Road, both remnants of earlier farming in the area.