Avenida Río San Joaquín is an elevated freeway in Mexico City extending from the Anillo Periférico beltway just outside the Mexican Federal District in Naucalpan, State of Mexico, in the west, to Avenida General Mariano Escobedo, in the east, at the juncture of the Polanco, Nuevo Polanco (Colonia Granada), and Anzures areas, continuing eastwards as Avenida Ejercito Nacional towards the Circuito Interior.