Twelve volcanoes in the arc are over 10,000 ft (3,000 m) in height, and the two highest, Mount Rainier and Mount Shasta, are over 14,000 ft (4,300 m). By volume, the two largest Cascade volcanoes are the broad shields of Medicine Lake Volcano and Newberry Volcano, which are about 145 mi³ (600 km³) and 108 mi³ (450 km³) respectively.