The Desierto de Altar is a vast desert located in northwestern Mexico, primarily within the state of Sonora. It covers an area of approximately 1,500 square miles and is characterized by its unique landscapes, including sand dunes, rocky outcrops, and sparse vegetation. The desert is part of the larger Sonoran Desert ecosystem, which is known for its diverse flora and fauna. This desert is home to various wildlife species, including reptiles, mammals, and birds adapted to arid conditions. The Desierto de Altar also features several important archaeological sites, reflecting the rich cultural history of the region, including ancient Indigenous settlements and trade routes.