The Lerma, on the northern frontier, and the Balsas on the southern, are the only rivers of importance of the state, their tributaries within its boundaries being small and swift-flowing.
Besides Morelia, the capital and largest city, the principal towns of the state are: La Piedad (pop. 15,123), an important commercial town on the Lerma river and on the Mexican Central railway, 112 m.
The Rio Grande de Lerma, or Santiago, is the principal river, whose sources are to be found on the high plateau in the state of Mexico.
His favourite, Olivares, was a far more honest man than the duke of Lerma, and was more fit for the place of prime minister than any Spaniard of the time.
The Mexican Central gives it railway connexion with the national capital and other prominent cities of the Republic. Leon stands in a fertile plain on the banks of the Turbio, a tributary of the Rio Grande de Lerma, at an elevation of 5862 ft.
The largest rivers of Mexico are: the Rio Grande de Santiago, called the Lerma above Lake Chapala, rising in the state of Mexico and flowing westward across Guanajuato, Jalisco and Tepic to the Pacific coast, with a total length of 540 m., celebrated for its deep canyons and waterfalls; the Rio de las Balsas, or Mescala, which rises in Tlaxcala and flows south and west to the Pacific with a course of 426 m.; the Yaqui, which rises in western Chihuahua and, after breaking through the northern ranges of the Sierra Madre Occidental, flows south-westerly across Sonora to the Gulf of California, with a length of 390 m.; the Grijalva, also called the Chiapas on its upper course, which has its sources in the state of Chiapas and flows north-west and north across Tabasco to the Gulf of Mexico, with a total length of 350 m.; the Fuerte, which rises in southern Chihuahua and, after breaking through the sierras, flows south-west across Sinaloa to the Gulf of California, with a course of 340 m.; the Usumacinta, which is formed by the confluence of the Chixoy and Pasion on the east frontier of Chiapas, and flows north-west across Tabasco to the Grijalva, with a course of 330 m.; and the Panuco, which has its source in the north-west of the state of Mexico and flows north-eastward to the Gulf of Mexico.
Wide, which receives the waters of the Lerma and discharges into the Pacific through the Santiago.
The greater part of the state is drained by the Rio Grande de Lerma (called the Santiago on its lower course) and its tributaries, chief of which is the Rio Verde.
Chiefly to Francis duke of Lerma, by Philip IV.
The new king put the direction of his government entirely into the hands of his favourite, the duke of Lerma, and when he fell under the influence of Lerma's son, the duke of Uceda, in 1518, he trusted himself and his states to the new favourite.