Llano Estacado
Llano Estacado (ˈʝano estaˈkaðo, (meaning Palisaded Plains), commonly known as the Staked Plains, is a region in the Southwestern
Southwestern United States
The Southwestern United States is a region defined in different ways by different sources. Broad definitions include nearly a quarter of the United States, including Arizona, California, Colorado, Nevada, New Mexico, Oklahoma, Texas and Utah...

 United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 that encompasses parts of eastern New Mexico
Eastern New Mexico
Eastern New Mexico is a region of the U.S. state of New Mexico. The region is sometimes termed the "High Plains" or even "Little Texas". The region is largely coterminous with the Llano Estacado. Eastern New Mexico is generally located at an altitude of over 4,000 feet and is mostly characterized...

 and northwestern Texas
Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...

, including the South Plains
South Plains
South Plains is a vernacular term that refers to a region in West Texas consisting of the portion of the Llano Estacado extending south of the Texas Panhandle, centered at Lubbock. While prominent in the area of petroleum production, the South Plains is mainly an agricultural region, producing a...

 and parts of the Texas Panhandle
Texas Panhandle
The Texas Panhandle is a region of the U.S. state of Texas consisting of the northernmost 26 counties in the state. The panhandle is a rectangular area bordered by New Mexico to the west and Oklahoma to the north and east...

. One of the largest mesa
A mesa or table mountain is an elevated area of land with a flat top and sides that are usually steep cliffs. It takes its name from its characteristic table-top shape....

s or tablelands on the North America
North America
North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...

n continent, the elevation rises from 3000 feet (914.4 m) in the southeast to over 5000 feet (1,524 m) in the northwest, sloping almost uniformly at about 10 ft/mi.