Tamaulipas is bordered by the states of Veracruz to the southeast, San Luis Potosí to the southwest and Nuevo León to the west. To the north, it has a 370 km (230 mi) stretch of the U.S.–Mexico border along the state of Texas. The state capital is Ciudad Victoria.
El Cielo Biosphere Reserve
The El Cielo Biosphere (Reserva de la Biosfera El Cielo in Spanish) is located in the southern part of the Mexican state of Tamaulipas. The biosphere protects the northernmost extension of tropical forest and cloud forest in Mexico. It has an area of 144,530 hectares (357,100 acres) (558 square miles) made up mostly of steep mountains rising from about 200 metres (660 ft) to a maximum altitude of more than 2,300 metres (7,500 ft). The state of Tamaulipas created the biosphere in 1985. In 1987 it was recognized by UNESCO’s Man and the Biosphere Programme.