Mount Jefferson from the Pacific Crest Trail
Jefferson is the second highest mountain in Oregon, and was named by the Lewis and Clark Expedition. The Mount Jefferson Wilderness, from which this photo was taken, covers more than 173 square miles.
The Spring Mountains, Red Rock Canyon National Conservation Area, Nevada
This canyon in the Mojave Desert is graced by brightly colored Aztec sandstone cliffs.
Palouse River Canyon, Washington
The 167 mile long Palouse River flows toward the Snake River. The Palouse carved this canyon in this area sculptured by the Missoula Floods of the last ice age. The geologic features of the canyon are full of evocative names; the Sentinel Bluffs flows of the Grand Ronde Formation; the Ginkgo Flow of Wanapum Basalt.