Sierra Púrica

The Sierra La Púrica is part of a Madrean Sky Island complex in northeastern Sonora with the Sierras la Buenos Aires and de los Ajos to the north and Sierra Nacozari to the south. The east side of the Sierra La Púrica drains into the Río Cabullona, an upper tributary of the Río Bavispe-Yaqui drainage. The western slopes drain into the Río Sonora. The southeastern edge of the Sierra La Púrica and the connecting Sierra Nacozari drain into the Río Santa Rosa to the Río Moctezuma, and eventually the Río Yaqui.

The Púrica is primarily Madrean Oak Woodland, with some Pine/Oak Woodland and some true Pine Forest at the highest elevations, composed of Arizona, Apache, and Chihuahua pine. Interestingly one very small patch of aspen is known from a north facing slope high on the mountain.