Fishlake National Forest, Piute County, Utah
Photographer: Tyler Knudsen
Storm clouds gather over Mount Belknap (12,137 feet) in the Tushar Mountains, Utah’s third-highest range. The smooth, rounded slopes of this summit ridge are composed of easily eroded volcanic ash and lava flows. The mountains are part of the eruptive center of the Marysvale volcanic field, an area of intense volcanic activity between 32 and 22 million years ago.