Spires and rock formations along the Navajo Trail. Bryce Canyon National Park, 35,835 acres (14,502 ha), est. 9/15/1928. Natural amphitheater created by erosion along eastern side of Paunsaugunt Plateau. Distinctive geological structures called "hoodoos" formed by wind, water, and ice erosion of the river and lake bed sedimentary rocks. Garfield and Kane County, UT.