On three sides Halcott's slopes are defined by alternating creek valleys and ridges that divide them. The eastern slopes are steeper, falling into Deep Notch, the pass between it and Mount Sherrill to the east, traversed by state highway NY 42. The south slopes lead more gradually, with a few steep sections, to the Birch Creek valley. On the southwest the ridge with the tripoint continues to a height of land between Halcott and Monka Hill, site of the former Grand Hotel. Another, more westerly ridge reaches a col between Halcott and one of the several South Mountains in the Catskills. Estimates of the mountain's actual summit elevation range to the higher end of the 20-foot (6 m) contour interval, to as high as .