In 1786 the Spanish crown ordered the creation of the Municipality of Veracruz. The area remained a Canton until 1917. Consequently, the municipality became important for political and administrative organization. November 21, 1907 is considered the founding date of the city of Tres Valles. However, the exact date is unknown. The earliest record with that date in 1982, when a commemorative monument to Miguel Hidalgo was placed in the city's central park. It seems that during the process of building the monument, the date was established. There's also a document dated November 24, 1939 stating that the founding was "32 years ago", that is, around 1907. According to historians the settlement has existed since at least 1900, when a camp was created for builders of the Pacific Veracruz railway. The only relevant fact pointing to this period is the 1907 arrival of the Martinez family, owners of the land where the town was settled. Perhaps this and other facts have survived in the collective memory and over the passage of time, this has become the year considered the foundation of the community. In 1921, Three Valleys had a population of 791 persons (399 men and 392 women). In 1924, the first school was established (which now houses the School "March 18") which was directed by Prof. "Nacha", originally from Tierra Blanca, Veracruz. It was built by Ignacio Martinez, who also donated the land. Also in 1924, Martinez built the first Catholic chapel, in honor of Our Lady of Guadalupe. This location is now the Municipal Agency, as the chapel was stripped during the Cristero War. The banana boom ended with the plague the Sigatoka fungus. Soon after came the expropriation of the three banana companies, decreed by President Lázaro Cárdenas, which were merged into the "Transcontinental" company. The municipal territory covers an area of approximately 378.1km2, and is located in the south-central area of Veracruz, bounded by 96 ° 01 'and 96 ° 18' west of Greenwich and between 18 ° 10 '18 25' north latitude, in the region of Papalopan, between the state of Oaxaca and the towns of Tierra Blanca and Cosamaloapan. The main rivers are the Amapa and Tonto, followed in importance by the Hondo, Mondongo, the Coyote, Zapote, and Jobo. Tres Valles has a warm humid climate, with winter rainfall makingup less than 5% of the annual rainfall.