The Lerma River (Spanish: Río Lerma) is Mexico's second longest river. It is a 750 km-long (470 mi) river in west-central Mexico that begins in Mexican Plateau at an altitude over 3,000 metres (9,843 ft) above sea level, and ends where it empties into Lake Chapala, Mexico's largest lake, near Guadalajara, Jalisco. Lake Chapala is the starting point of Río Grande de Santiago, which some treat as a continuation of the Lerma River. In combination, the two are often called the Lerma Santiago River (Spanish: Río Lerma Santiago). The Lerma River is notorious for its pollution, but the water quality has demonstrated considerable improvement in recent years due mostly to government environmental programs and through massive upgrading projects of sanitation works.
The Lerma River originates from the Lerma lagoons near Almoloya del Río, on a plateau more than 2,600 metres (8,500 ft) above sea level, and 24 kilometres (15 mi) southeast of Toluca. The lagoons receive their water from springs rising from basaltic volcanics that flow down from Monte de Las Cruces. These are located between the Valley of Toluca and the Basin of Mexico.
Lerma may refer to:
Lerma is a village in the province of Burgos, part of the autonomous community of Castile and León, Spain. It has important monuments dating from the 17th century, which were built by the Duke of Lerma.
Collegiate church of San Pedro.
Collegiate church of San Pedro.
Ducal palace at Lerma, by Francisco de Mora.
Ducal palace at Lerma, by Francisco de Mora.
Monastery of la Ascensión de Nuestro Señor, also known as the Convento de Santa Clara.
Monastery of la Ascensión de Nuestro Señor, also known as the Convento de Santa Clara.