Zonda is located in south central
San Juan Province, from the city of
San Juan. it has an area of . It is bordered by the departments of
Ullum,
Sarmiento,
Rivadavia,
Pocito, and
Calingasta. The department has a mountainous landscape, and is dominated by foothills, or
precordillera, of the
Andes. Its western border is defined by the
Sierra de Marquesado and
Sierra Chica de Zonda,
mountain range, separate Zonda from its neighboring departments of Rivadavia and Pocitot. The
Sierra del Tontal constitutes the department's western border with Calingasta. Within the Sierra del Tontal the Chacay and las Cuevas rivers flow into the
Sasso River (Spanish:
Río Sasso), a tributary of the
San Juan River. Its border to the north with Ullum Department is divided by the
San Juan River, along which sit the
Punta Negra and
Los Caracoles dams. The highest mountain peak within Zonda is the
Blanco de las Cuevas, reaching 4190 meters in height. The average annual temperature is around with annual temperatures up to in summer and in winter below , with the presence of two dominant winds: a cold southern wind and the
Zonda wind, a hot and dry wind flowing from west to east. In the mountainous western part of the department, the fauna includes
cougar,
guanacos,
condors,
eagles,
falcons, and
owls. The department's natural flora is characterized by
prosopis,
larrea, genista,
totora, and
typha. File:Dique Punta Negra, provincia de San Juan, Argentina.jpg|The
Punta Negra Dam seen from Ruta Provincial 12 on Zonda's northern border. File:Dique y embalse Los Caracoles, prov. de San Juan, Argentina.jpg|View of the
San Juan River leading into the
Los Caracoles Dam. To the left is
Ullúm Department across the northern border, while Zonda is visible on the right side of the river. File:Serranías de Marquesado, San Juan, Argentina.jpg|View of the
Sierras de Marquesado from Zonda Valley File:Serranías de Marquesado y Parque Provincial Sarmiento (Zonda=San Juan=Argentina).JPG|View of the
Parque Presidente Sarmiento. File:Precordillera y Valle de Zonda, provincia de San Juan.jpg|The foothills and mountains surrounding Zonda Valley == Economy ==