Cumbres de Monterrey National Park, park in the Sierra Madre Oriental, in Nuevo León state, northeastern Mexico. Established in 1939, it has a total area of 952 square miles (2,465 square km). Among the attractions within the park are the mountains of the Sierra Madre Oriental, many of which are more than 7,000 feet (2,100 metres) above sea level and have pine and oak forests on the lower slopes; the Huasteca Canyon ecological park near Monterrey; and the 82-foot (25-metre) Cola de Caballo (Spanish: “Horse Tail”) waterfalls, southwest of Santiago.