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Extremes Points In The United States


Dungenese Wildlife Refuge, Washington

July 24, 2021



List of extreme points of the United States

There are a number of different interpretations for "easternmost" and "westernmost"; see below for full treatment.

This is a list of points in the United States that are farther north, south, east, or west than any other location in the country. Also included are extreme points in elevation, extreme distances, and other points of peculiar geographic interest.



Extreme points in the 50 states: Point Barrow, Ka Lae, Sail Rock, Peaked Island


Extreme points in the contiguous 48 states: Northwest Angle, Ballast Key, Sail Rock, Bodelteh Islands


Extreme points of the U.S. on the North American continent: Point Barrow, Cape Sable, West Quoddy Head, Cape Prince of Wales


Extreme points in all U.S. territory: Point Barrow, Rose Atoll, Wake Island, Peaked Island (red dots); Point Udall, Guam, and Point Udall, USVI are shown as green dots. The International Date Line is shown in yellow.

Northernmost points

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Southernmost points Map this section's coordinates using:OpenStreetMapDownload coordinates as:KML


Easternmost points

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Westernmost points

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Interpretation of easternmost and westernmost

There are three methods for reckoning the eastern and western extremes of the United States.

One method is to use the Prime Meridian as the dividing line between east and west. This meridian running through Greenwich, London, is defined as zero degrees longitude and could be called the least eastern and least western place in the world. The 180th meridian, on the opposite side of the globe, is therefore the easternmost and westernmost place in the world.

Another method is to use the International Date Line as the easternmost–westernmost extreme. On the equinox, the easternmost place would be where the day first begins, and the westernmost is where the day last ends.[citation needed] Still another method is to first determine the geographic center of the country and from there measure the shortest distance to every other point. All U.S. territory is spread across less than 180° of longitude, so from any spot in the U.S. it is more direct to reach the easternmost point, Point Udall, U.S. Virgin Islands, by traveling east than by traveling west. Likewise, there is not a single point in U.S. territory from which heading east is a shorter route to the westernmost point, Point Udall, Guam, than heading west would be, even accounting for circumpolar routes. The two different Point Udalls are named for two different men: Mo Udall (Guam) and Stewart Udall (Virgin Islands), brothers from the Udall family of Arizona who both served as U.S. Congressmen.

Highest points

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Lowest points

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Other points

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Islands Map this section's coordinates using:OpenStreetMap Download coordinates as: KML


Lakes

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Rivers

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Extreme distances

  • Greatest east–west distance in the 48 contiguous states: 2,800 miles (4,500 km)

  • Greatest north–south distance in the 48 contiguous states: 1,650 miles (2,660 km).

  • Greatest distance between any two points in U.S. territory: 9,514 miles (15,311 km), from Point Udall, Guam, to Point Udall, St. Croix, U.S. Virgin Islands(formerly known as Orote Point and East Point, respectively).

  • Greatest distance between any two points in the 50 states: 5,859 miles (9,429 km), from Kure Atoll, Hawaii, to Log Point, Elliott Key, Florida.

  • Greatest distance between any two points in the contiguous 48 states: 2,901 miles (4,669 km), from North Farallon Island, California, to Sail Rock, east of West Quoddy Head, Maine.

  • Greatest driving distance between any US territory in contiguous lower 48 states (via US highway system): 3,689 miles (5,937 km), from Fort Zachary Taylor, Key West, Florida, to Cape Flattery, Washington.

  • Greatest distance between any two mainland points in the contiguous 48 states (linear distance): 2,892 miles (4,654 km), from Point Arena, California, to West Quoddy Head, Maine.

  • Greatest east–west distance in U.S. territory 5,823 miles (9,371 km), from Kure Atoll, Hawaii, to Riviera Beach, Florida.

Some map projections make diagonal lines appear longer than they actually are. The diagonal line from Kure Atoll, Hawaii, to West Quoddy Head, Maine, is 5,797 miles (9,329 km); and the diagonal from Cape Wrangell, Attu Island, Alaska, to Log Point, on Elliott Key, Florida, is 5,505 miles (8,859 km).

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