Peloncillo Mountains

The Peloncillo region and its ranges, connecting valleys, and drainages encompass a landscape that includes an international border and the boundaries between four states: Arizona and New Mexico in the United States, and Sonora and Chihuahua in Mexico.

The Peloncillo region also overlies the unique juncture of six major biological provinces and numerous discrete habitat types. The result is one of the most diverse and productive natural areas in North America, a refugium for dozens of threatened and endangered species, and a vital corridor for wildlife movement and migration. Yet it is an area that is underappreciated, understudied, and in need of protection and stewardship to maintain both its natural and its cultural values.

See this extensive report on the Peloncillos and surrounding area.