This beautiful mountain range contains well-preserved petrified trees that are still in their original upright position. The trees in the foreground are narrow-leaf cottonwood (Populus angustifolia). In the distant foothills are quaking aspen (P. tremuloides).

The upper slopes of Specimen Ridge contain many interesting fossils, including well-preserved petrified trees that are still in their original upright position. The trees in the foreground are narrow-leaf cottonwood (Populus angustifolia). In the distant foothills are quaking aspen (P. tremuloides).