The following outline is provided as an overview of and topical guide to the U.S. state of Alaska: Alaska – most extensive, northernmost, westernmost, highest, second newest, and least densely populated of the 50 states of the United States of America. Alaska occupies the westernmost extent of the Americas, bordering British Columbia and the Yukon, and is detached from the other 49 states. The summit of Denali (formerly Mount McKinley) at 6,194 meters (20,308 feet) is the highest point of North America.