El Pinacate and Gran Desierto de Altar Biosphere Reserve is a biosphere reserve and UNESCO World Heritage Site managed by the federal government of Mexico, specifically by Secretariat of the Environment and Natural Resources, in collaboration with the state governments of Sonora and the Tohono O'odham.
Location: Sonora, Mexico
Established: June 10, 1993
Nearest city: Puerto Peñasco · Plutarco Elías Calles · San Luis Río Colorado
Area: 2,695.05 km² (1,040.56 sq mi)
Governing body: Instituto Nacional de Ecología and Tohono O'odham