History The
Mazahua people first populated this area, migrating from the north. One of these migrations is documented in the Annals of Cuauhtitlán, which occurred in 538 AD, when five tribes headed by Ehécatl, Coahuatzin, Mazacóatl, Otzihuacoatl and Tlalpanhuitz y Huitz, with Mazacóatl leading them. The first populations settled in communities now known as
Tapaxco, Endotejiare, Tultenango and Santiago Oxtempan, all of which are in the current municipality of El Oro. Initially, the Mazahuas were hunter-gatherers but dedicated themselves to agriculture and fishing as well as hunting, as the Mazahua-populated region became dominated the
Toltecs, the
Chichimecas and then the Aztecs. The last group conquered this area in 1474 by
Axayacatl. Foreign investment here reached its peak near the end of the 19th century into the early 20th century, introducing new technologies, such as a rail line, and electricity. These were introduced primarily in the town of El Oro, which began to establish it as the primary center over Tapaxco. Furthering its importance was the discovery of the Esperanza vein, which greatly increased the town's population. El Oro was declared the head of the municipality by two decrees, one issued in 1901 and the other in 1902, giving it the town official name of El Oro de Hidalgo. In 1926, a number of mines, including El Oro Mining and Railway Co., La Esperanza Mining and others, began to cut back production, stating that the deposits were tapped out. but the station was completed in 1899. To the side of the station is an antique rail car which contains a restaurant, which contains a collection of photographs from the town's mining heyday.
Festivals There are two major festivals in the town. The first is
Carnival, celebrated with the typical costumes and parades, but
cockfights,
charreada rodeos and horse racing. The other is the feast day of the
Virgin of Guadalupe, as the town's main church is named after her. In addition to processions and fireworks, regional indigenous dances are performed. ==The municipality==