June 1964  The most spectacular canyons are slot canyons, many of which are several hundreds of feet deep, often wider at their bottoms that at their tops.  This is the upper end of one of them, probably False Entrance Canyon   (Also known as "Pickax Canyon" and "Mountain Sheep Canyon").

Gregory Natural Bridge from the air.  It's just above the center of the photo on the left.  The view is upstream in Soda Gulch.

Glen Canyon