| San Andres Mountains | |
|---|---|
 Black and Bennett Mts. on the southeastern end of the San Andres Mountains | |
| Highest point | |
| Peak | Salinas Peak |
| Elevation | 8,965 ft (2,733 m) |
| Coordinates | 33°17′55″N106°31′53″W / 33.29861°N 106.53139°W /33.29861; -106.53139 |
| Dimensions | |
| Length | 75 mi (121 km) N-S |
| Width | 12 mi (19 km) W-E |
| Geography | |
 Location of the San Andres Mountains within New Mexico | |
| Country | United States |
| State | New Mexico |
| Borders on | Organ Mountains |
| Geology | |
| Rock type | Limestone |
TheSan Andres Mountains are amountain range in the southwesternU.S. state ofNew Mexico, in thecounties ofSocorro,Sierra, andDoña Ana. The range extends about 75 miles (121 km) north to south, but are only about 12 miles (19 km) wide at their widest. The highest peak in the San Andres Mountains isSalinas Peak, at 8,965 feet (2,733 m).
Though nearly contiguous with theOrgan Mountains to the south, separated by St. Augustine Pass (elevation 1,717 m (5,633 ft)) and U.S. Highway 70, the two are very distinct geologically and botanically. TheOscura Mountains to the north are separated from the San Andres Mountains by Mockingbird Gap (elevation 1,631 m (5,351 ft)) and the much lower Little Burro Mountains. The San Andres Mountains are comparatively dry and do not support extensive woodlands. They are mostly closed to the public, lying almost entirely within the restrictedWhite Sands Missile Range.
The San Andres Mountains form part of the eastern edge of therift valley of theRio Grande, and are made up of west-dippingfault blocks made primarily of San Andres Formationlimestone, but also with extensive exposures of reddishAbo Formationsandstone on the western side, andquartz monzonite on the eastern side.[1]Gypsum deposits washed from these mountains are the main source of the dunes inWhite Sands National Park.
Significant summits include:[2]
| Mountain | Height (ft) | Height (m) | Coordinates | Prominence (ft) |
|---|---|---|---|---|
| Salinas Peak | 8,965 | 2,733 | 33°17′55″N106°31′53″W / 33.2986°N 106.5315°W /33.2986; -106.5315 | 3,625 |
| San Andres Peak | 8,235 | 2,510 | 32°40′34″N106°32′13″W / 32.6760°N 106.5369°W /32.6760; -106.5369 | 2,525 |
| Chalk Hills High Point | 7,988 | 2,435 | 33°10′47″N106°43′21″W / 33.1796°N 106.7226°W /33.1796; -106.7226 | 1,728 |
| Unnamed Peak | 7,646 | 2,331 | 32°54′16″N106°34′49″W / 32.9045°N 106.5803°W /32.9045; -106.5803 | 1,899 |
| Gardner Peak | 7,534 | 2,296 | 32°49′27″N106°33′45″W / 32.8242°N 106.5624°W /32.8242; -106.5624 | 2,052 |
| Black Brushy Mountain | 7,521 | 2,292 | 32°35′51″N106°31′08″W / 32.5976°N 106.5189°W /32.5976; -106.5189 | 1,701 |
| Capitol Peak | 7,098 | 2,163 | 33°24′24″N106°25′30″W / 33.4068°N 106.4249°W /33.4068; -106.4249 | 1,833 |
The biggest and bestdesert bighorn sheep habitat in New Mexico is in the San Andres Mountains, which can host up to 400 bighorn.[3] An area of 57,215 acres (231.54 km2) in the southern portion of the San Andres Mountain range was set aside in 1941 as theSan Andres National Wildlife Refuge[4] to help preserve the desert bighorn sheep, which at the time numbered 33. In the mid-1970s there were around 200 sheep in the refuge;[3] however, in 1979, a scabies mite epizootic reduced the population from 200 to 75.[3] Subsequent years brought further declines from scabies and other causes until the population consisted of one ewe in 1997. Reintroduction of desert bighorn sheep occurred in 2002 and the herd has now about 80 members.[5]
| International | |
|---|---|
| National | |
| Other | |
