| Sierra La Esmeralda | |
|---|---|
 | |
| Dimensions | |
| Length | 15 mi (24 km) |
| Width | 15 mi (24 km) |
| Geography | |
| Country | Mexico |
| State | Sonora |
| Regions | Sonoran Desert and Tumacacori Highlands |
| Cities | Nogales, Arizona and Nogales, Sonora |
| Range coordinates | 31°10′N 111°07′W / 31.17°N 111.11°W |
| Borders on | Pajarito Mountains[1] and U.S.-Mexico border |
The Sierra La Esmeralda range, (Emerald Mountains) are a mountain range in northern Sonora, Mexico at the northern region of the Sierra Madre Occidental cordillera. The region contains sky island mountain ranges, called the Madrean Sky Islands, some separated from the Sierra Madre Occidental proper, and occurring in the northeastern Sonoran Desert, and extreme west-northwestern Chihuahuan Desert. Many of the ranges occur in southeast Arizona.
Sierra La Esmeralda anchors the southern portion of the Tumacacori Highlands. The range is part of a Sky Island Alliance study of wild cats, called Cuatros Gatos, (Four Cats).[2]
Nogales, Arizona and Nogales, Sonora lie at the northeast of the range.