Hack Flats is a flat in New York's Catskill Mountains, located south-southwest of Grand Gorge. Its setting is defined by nearby high ground, with White Man Mountain to the west, Roundtop to the east-northeast, and Red Mountain to the southwest. Although some identification classifies it as a mountain, the available account specifically characterizes Hack Flats as a flat within the Catskills, making that landscape designation the key fact about the place.