The collection of boulders at the base of the cliff is where Boulder Boy
photographed himself ( http://www.pbase.com/listorama/image/61299390 ).
To the right of the cliff ("ridge") is a sheer drop of 400 feet
(125m) to a talus slope just above the Colorado River.

From the river, this cliff face is visible under the cloud:
http://www.pbase.com/listorama/image/60884917 .
.