The Hemenway Wall is located at the south end of Boulder Basin and extends from Horsepower Cove to the entrance to Black Canyon.  Diving  varies from a gradual slope (near the west end) to a vertical wall (at the east end.)

This area is accessible by boat only and because of the mountainous terrain, is usually a better choice for boat diving on windy days as the mountains provide a natural windbreak.  It is also frequented by anglers, which makes it an excellent area to search for lost anchors and fishing poles.

The steep, boulder laden slopes along the middle portion of the wall provide a unique diving environment.  With the steep sloping bottom, deeper depths are easily achieved for deep or technical diving.