Tags: Mountain Range.
The San Andres Mountains are a mountain range in the southwestern U.S. state of New Mexico in the counties of Socorro Sierra and Doña Ana. The range extends about 75 miles (120 km) north to south but are only about 12 miles (19 km) wide at their widest. The highest peak in the San Andres Mountains is Salinas Peak at 8965 feet (2733 m).