The Laja River, located in the state of Guanajuato in arid central Mexico, is a vital corridor of green essential for migratory and local wildlife and essential for the survival of local communities. It is a tributary of the Rio Lerma, one of Mexico's largest rivers and a major industrial corridor, which flows west to Lake Chapala. The Lerma ecoregion is considered globally outstanding by the World Wildlife Fund for its highly endemic fish fauna. Its degree of taxonomic endemism is “virtually unsurpassed in North America and is rare worldwide.”
Salvemos al Rio Laja, A.C. (also known as Save the Laja) is a private non-profit organization dedicated to conserving and rehabilitating the Rio Laja Watershed including Santa Rosa, the major watershed forest. It was formed in 1999 by former officers of Sociedad Audubon de Mexico located in San Miguel de Allende in the river valley and of the Fundacion Ecologica de Guanajuato, in Santa Rosa, in the mountains near the city of Guanajuato.