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New Mexico

New Mexico Geography

The Rocky Mountains, cover New Mexico's eastern border with Texas. This elevated plateau area gradually blends with the large (and flat) treeless areas of western Oklahoma and Texas.


The Colorado Plateau, a series of flat lands, gorges, mountains and valleys, slices across the state's northwestern corner.

The tree-covered Rocky Mountains extend south into New Mexico; significant ranges include the Jemez, Sangre de Cristo, and Zuni. Along the southern reaches of New Mexico, the Black Range, and the rugged Guadeloupe, Mongollon, Sacramento and San Andres Mountains dominate the landscape.

The state's most dramatic feature, the Rio Grande, rising in southwestern Colorado, flows south through New Mexico, later forming the natural border between Mexico and Texas. Other rivers of size include the Canadian, Gila and Pecos.

For a detailed look at the topography of New Mexico, view this Landforms of America

  • Landforms of North America
  • Rivers of North America
  • New Mexico Photographs

    white sands new mexico

    White Sands, New Mexico

    New Mexico Cities, Counties & Area Codes

    City County Area Code
    Albuquerque Bernalillo 505
    Reserve Catron 575
    Roswell Chaves 575
    Grants Cibola 505
    Raton Colfax 575
    Clovis Curry 575
    Fort Sumner De Baca 575
    Las Cruces Dona Ana 575
    Carlsbad Eddy 575
    Silver City Grant 575
    Santa Rosa Guadalupe 575
    Roy Harding 575
    Lordsburg Hidalgo 575
    Hobbs Lea 575
    Ruidoso Lincoln 575
    Los Alamos Los Alamos 505
    Deming Luna 575
    Gallup McKinley 505
    Mora Mora 575
    Alamogordo Otero 575
    Tucumcari Quay 575
    Espanola Rio Arriba 505
    Portales Roosevelt 575
    Farmington San Juan 505
    Las Vegas San Miguel 505
    Rio Rancho Sandoval 505
    Santa Fe Santa Fe 505
    Truth or Consequences Sierra 575
    Socorro Socorro 575
    Taos Taos 575
    Moriarty Torrance 505
    Clayton Union 575
    Los Lunas Valencia 505
    This page was last updated on April 7, 2017.