Tumacacori Mountains

The Tumacacori Highlands comprise three small closely spaced mountain ranges on the United States and Mexico border just west of Nogales. The San Luis Mountains lie just to the west of these three mountain ranges. These ranges are continuous with similar highlands that stretch southward into Mexico. Although unimposing in elevation, the Tumacacori Highlands have sharp ridges, steep slopes, and rocky cliffs that limit the number of roads and give the area a feeling of remoteness. The vegetation is scattered evergreen oak woodlands on north-facing slopes with scrub grasslands on south-facing slopes. Mesquite and acacia shrubs are common, as are agaves and sotols.

The mountain range is within the Nogales Ranger District which lies just west of Interstate 19 and extends southward to the international border.