Anthony's Nose, together with Dunderberg Mountain, comprises the South Gate of the Hudson Highlands. It forms a ridge running northeast and southwest, being separated from Canada Hill to the northeast by Copper Mine Brook and the "South Mountain Pass", and is bordered on the southwest by the Hudson. The Hudson makes a turn around the southwestern tip so that the northwestern side also slopes down to salt marshes along the river. On the southeastern side is Mine Mountain and, across Broccy Creek, Manitou Mountain. Most of this land is part of Camp Smith, a New York National Guard reservation.