Lejía Lake lies in the Puna de Atacama of Chile, close to the border with Argentina. The city of San Pedro de Atacama lies northwest of Lejía Lake. The lake basin is surrounded by volcanoes, such as Aguas Calientes, Lascar, Tumisa, Lejía, Chiliques and Cordon de Puntas Negras. The lake is endorheic and has a large catchment, and a lava flow forms its southern shore. Farther south lie two other lakes, Laguna Miscanti and Laguna Miniques.