But there was something else. Before sunrise and after sunset there was the glow.
It takes a few minutes after sunset but as the sky gets yellower in the west the warm reddish glow flows across the land. On those clear days it was by far the best light. For a few minutes early and late the rocks are bathed in color and soft light. The shadows almost do not exist and the scene just glows.
An afternoon at Green River Overlook on a cloudless day was ok, but the glow after sunset was WOW. The colors and light were much better with the glow than the last light of day.
On another afternoon I was photographing in Arches and there must have been 20 photographers nearby. They all left right at sunset and I watched the glow alone and made the best images of the day.