I have never seen pink clouds in the middle of the day. But our guess that they were simply reflecting the colors of the dessert.
The Temples of the Sun and Moon are located in a remote region of Capitol Reef National Park named Cathedral Valley. It is a remote, stark desert characterized by amazingly beautiful sandstone monoliths that some say resemble cathedrals. Many of the valleys structures have interesting, highly descriptive names: Temple of the Sun, Temple of the Moon, The Walls of Jericho, among others..
