San Martín de los Andes is a city in the south-west of the province of Neuquén, Argentina, serving as the administration centre of the Lácar Department. Lying at the foot of the Andes, on the Lácar lake, it is considered one of the main tourism destinations in the province. The National Route 40 runs to the city, connecting it with important touristic points in the south of the province, such as Lanín and Nahuel Huapí national parks.

Neuquén is a province of Argentina, located in the west of the country, at the northern end of Patagonia. It borders Mendoza Province to the north, Rio Negro Province to the southeast, and Chile to the west. It also meets La Pampa Province at its northeast corner.