Brief synthesisEl Pinacate and Gran Desierto de Altar Biosphere Reserve (EPGDABR) is located in the Sonoran Desert. The volcanic shield boasts a wide array of volcanic phenomena and geological formations, including a small shield-type volcano. The volcanic shield in the property boasts a wide array of volcanic phenomena and geological formations, including a small shield-type volcano. Several endemic species of plants and animals exist, including two freshwater fish species. IntegrityEl Pinacate and Gran Desierto de Altar Biosphere Reserve is relatively undisturbed and has an outstandingly high level of physical integrity to a greater extent related to its harsh environment.