Starting Point: St. George, Utah - 10:00 am
Ending Point: St. George, Utah - 5:00 pm
| Average Daily Highs (°F) |
June | July | August | Sept. |
| Bryce | 75 | 80 | 77 | 72 |
| Grand Canyon | 73 | 77 | 75 | 69 |
| Zion | 94 | 97 | 95 | 89 |
How the Canyon Became Grand, A Short History -
Stephen J. Pyne
From worthless real estate to marvel of nature, the history of the Grand Canyon and our appreciation of the wilderness is documented by environmental historian Stephen J. Pyne.
An Introduction to Grand Canyon Geology -
Sandra Scott,
L. Greer Price
A brief illustrated guide to the formation of the canyon, its tectonic setting and the other geological features.

