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Range DescriptionThis species' historical range included extreme south-central Arizona, USA, (known from Tinaja, Sycamore, and Pena Blanca/Alamo canyons in the Atascosa-Pajarito-Tumacacori Mountains complex; and Gardner, Big Casa Blanca, and Adobe canyons in the Santa Rita Mountains; Rio Altar and Santa Cruz River drainages), south in the Sierra Madre Occidental and adjacent sky island mountain ranges in Sonora and Chihuahua to northern Sinaloa, Mexico, at elevations from 460-2,070m asl (Zweifel 1968c, Hale and May 1983, Hale 2001). Most localities are in the mountains of eastern Sonora. The Tarahumara Frog has been extirpated from the USA since 1983, and more recently, from several sites in northern Sonora (Hale and May 1983, Hale et al. 1995, Hale 2001).