Interstate 25 in New Mexico

Interstate 25 and U.S. Route 85
Route information
Maintained by NMDOT
Length:	462.124 mi (743.716 km)
Existed:	1957 – present
Major junctions
South end:	I-10 / US 85 / US 180 in Las Cruces
	US 70 in Las Cruces US 380 near San Antonio US 60 from Socorro to Bosque I-40 in Albuquerque US 550 in Bernalillo US 84 / US 285 in Santa Fe US 84 in Las Vegas US 64 / US 87 in Raton
North end:	I-25 / US 85 / US 87 near Raton
Location
Counties:	Doña Ana, Sierra, Socorro, Valencia, Bernalillo, Sandoval, Santa Fe, San Miguel, Mora, Colfax
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future State Roads in New Mexico Interstate US State Minor Scenic ← NM 24 I-25 NM 26 → ← NM 83 US 85 NM 88 →

Interstate 25 (I-25) in the U.S. state of New Mexico follows the north–south corridor through Albuquerque and Santa Fe. It replaced U.S. Route 85 (US 85), which is no longer signed, but still exists in route logs sharing the I-25 alignment. I-25 starts in New Mexico at an interchange with I-10 in Las Cruces and extends roughly 460 miles (740 km) before reaching Colorado. I-25 passes through principally rural land through central New Mexico and passes through or near the cities of Las Cruces, Truth or Consequences, Socorro, Belen, Albuquerque, Santa Fe, Las Vegas, and Raton.

I-25 begins at I-10's exit 144 in Las Cruces (elevation 4,000 feet (1,200 m)), just south of the New Mexico State University campus. I-25 is concurrent with US 85 at this point, and carries US 85 concurrently for the remainder of its run in New Mexico. Immediately, the Interstate passes east of the New Mexico State campus, and the next three exits provide access to the city. The first exit is University Avenue, which provides access to NMSU. The final exit in Las Cruces is U.S. Route 70. Upon exiting the city the speed limit increases by ten miles per hour to 75 mph. Before I-25 reaches Truth or Consequences and just south of Elephant Butte Reservoir State Park it crosses over to the west side of the Rio Grande. From Las Cruces to Santa Fe I-25 follows the route of El Camino Real de Tierra Adentro.

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