Peña Alta is a natural reserve of Mexico established in 1998. Located in the state of Guanajuato. It is located 12 km west from San Diego de la Unión, and it borders on the north with the El Verde and El Macho hills, as well as the town of El Carretón, and to the south with the El Madroño, San Juan hills. and the towns of Buenavista del Cubo and Las Cabras.
The type of vegetation present in this area are the pine forests (Pinus cembroides), forests of oak (Quercus spp.), Thorny scrub and crasicaule scrub.
Peña Alta is a habitat for wild animals such as the white-tailed deer (Odocoileus virginianus), the Bassariscus astutus cacomixtle, the gray fox (Urocyon cinereoargenteus), the raccoon (Procyon lotor), the badger (Taxidea taxus), the eagle (Aquila chrysaetos) , the red-tailed hawk (Buteo jamaicensis) and the quail (Colinus virginianus), among others.
It is a zone of temperate climate, and a water reservoir for the region, includes two dams in which the inhabitants carry out fishing activities.