Abstract: A foot (12) for attachment to a bottom end of a leg (18) of a walker or other ambulatory aid. The foot includes a tubular collar (24) with a central passage (26) that receives the leg. A ski-shaped base (28) projects from the bottom of the collar, generally orthogonally relative to the central axis of the collar. The base extends further in the forward direction to form an extended ramp-angle tip section (30). A frustoconical bottom ground engaging surface (34) of the base slopes upwardly from a central lower-most area (60) of the base towards the left and right sides and towards the front and rear ends of the base. The outer perimeter edge (36) of the base is thus raised relative to the lower-most area of the base, particularly at the extended tip section. The foot also includes an internal expansion bolt assembly (46) to secure the foot onto the bottom of the leg.