Tuberculosis (TB) Tuberculosis (TB) Active tuberculosis (TB) is very contagious. The World Health Organization (WHO) estimates that one-third of the world's population is infected with the bacteria that cause TB.
With an average elevation of 6,800 feet, Colorado is the highest state in the United States. A mountain lake outside of the skiers dreamland of Aspen, Colorado. The US is bordered to the north by Canada and Mexico to the South. With 50 states of varied sizes, US is considered the largest nation in America.
The following sortable table lists the 50 highest mountain peaks of the United States with at least 500 meters (1640 feet) of topographic prominence. Of these 50 highest major peaks, 28 are located in Colorado, 14 in Alaska, 7 in California, and 1 in Washington.