New Mexico State Map

Geography of New Mexico

New Mexico is the fifth-largest state by area but 36th in population. Most people live in the center, around Albuquerque, Rio Rancho and Santa Fe; much of the rest is desert, mountains and ranch land.

The Continental Divide crosses the western part of the state, between Gallup and Grants on I-40 and near Silver City in the south. Rain falling west of it drains toward the Pacific; to the east, toward the Gulf of Mexico.

Southern Rocky Mountains

The Sangre de Cristo Mountains reach south from Colorado to Santa Fe and hold Wheeler Peak, the state’s highest point, near Taos. The Jemez Mountains rise west of the Rio Grande and hold the Valles Caldera and Los Alamos.

Rio Grande Valley

The Rio Grande enters from Colorado, cuts the Rio Grande Gorge near Taos, and flows south through Albuquerque, Socorro, Truth or Consequences and Las Cruces before leaving the state at El Paso, Texas. Most of New Mexico’s larger cities lie along this valley.

Colorado Plateau

The northwest corner is high mesa and canyon country around Farmington and Gallup, with Shiprock, Chaco Culture National Historical Park and part of the Navajo Nation. The Four Corners Monument marks the one point where New Mexico, Arizona, Colorado and Utah meet.

Great Plains

The eastern third is flat grassland: the High Plains around Clovis and Tucumcari and the Llano Estacado along the Texas line near Hobbs. The Pecos River flows south past Fort Sumner, Roswell and Carlsbad into Texas.

Basin and Range and the Chihuahuan Desert

The south and southwest are desert basins separated by short mountain ranges, including the Organ, Sacramento and Mogollon ranges. The Gila Wilderness near Silver City was the world’s first designated wilderness area, set aside in 1924.

National parks

• Carlsbad Caverns National Park: limestone caves in the Guadalupe Mountains southwest of Carlsbad.
• White Sands National Park: gypsum dunes in the Tularosa Basin near Alamogordo.

New Mexico county map

New Mexico’s 33 counties are large. Catron County, in the mountains of the west-central part of the state, covers about 6,924 sq mi of land, and Socorro County is nearly as big. Los Alamos County is the smallest, about 109 sq mi. Bernalillo County, which includes Albuquerque, had 676,444 people in 2020, nearly a third of the state’s population; Doña Ana County (Las Cruces) was second with 219,561. Harding County, on the northeastern plains, had 657 residents, one of the smallest county populations in the country.

Major highways

• I-25: north–south from the Colorado line at Raton through Las Vegas, Santa Fe, Albuquerque and Socorro to Las Cruces, where it meets I-10.
• I-40: east–west from Arizona through Gallup, Grants, Albuquerque, Santa Rosa and Tucumcari to Texas, roughly following historic Route 66.
• I-10: from Arizona through Lordsburg, Deming and Las Cruces to El Paso, Texas.
• US 285: from the Colorado line through Santa Fe, Roswell and Carlsbad toward Texas.
• US 550: from Bernalillo, north of Albuquerque, northwest to Farmington and Colorado.
• US 70 and US 54: southern routes linking Las Cruces, Alamogordo, Roswell, Clovis and Tucumcari.