page_title: Chiapas
section_title: Geographical regions
hierarchical_section_title: Chiapas / Geography / Geographical regions
context_page_description: Chiapas, officially the Free and Sovereign State of Chiapas, is one of the states that make up the 32 federal entities of Mexico. It is divided into 124 municipalities as of September 2017 and its capital city is Tuxtla Gutiérrez. Other important population centers in Chiapas include Ocosingo, Tapachula, San Cristóbal de las Casas, Comitán and Arriaga. It is the southernmost state in Mexico, and it borders the states of Oaxaca to the west, Veracruz to the northwest and Tabasco to the north, and the Petén, Quiché, Huehuetenango, and San Marcos departments of Guatemala to the east and southeast. Chiapas has a coastline along the Pacific Ocean to the south.
  In general, Chiapas has a humid, tropical climate. In the north, in the area bordering Tabasco, near Teapa, rainfall can average more than 3,000 mm per year. In the past, natural vegetation in this region was lowland, tall perennial rainforest, but this vegetation has been almost completely cleared to allow agriculture and ranching. Rainfall decreases moving towards the Pacific Ocean, but it is still abundant enough to allow the farming of bananas and many other tropical crops near Tapachula.
context_section_description: The state has a complex geography with seven distinct regions according to the Mullerried classification system. These include the Pacific Coast Plains, the Sierra Madre de Chiapas, the Central Depression, the Central Highlands, the Eastern Mountains, the Northern Mountains and the Gulf Coast Plains. The Pacific Coast Plains is a strip of land parallel to the ocean. It is composed mostly of sediment from the mountains that border it on the northern side. It is uniformly flat, and stretches from the Bernal Mountain south to Tonalá. It has deep salty soils due to its proximity to the sea. It has mostly deciduous rainforest although most has been converted to pasture for cattle and fields for crops. It has numerous estuaries with mangroves and other aquatic vegetation.
  The Sierra Madre de Chiapas runs parallel to the Pacific coastline of the state, northwest to southeast as a continuation of the Sierra Madre del Sur. This area has the highest altitudes in Chiapas including the Tacaná Volcano, which rises 4,093 m (13,428 ft) above sea level. Most of these mountains are volcanic in origin although the nucleus is metamorphic rock. It has a wide range of climates but little arable land. It is mostly covered in middle altitude rainforest, high altitude rainforest, and forests of oaks and pines. The mountains partially block rain clouds from the Pacific, a process known as Orographic lift, which creates a particularly rich coastal region called the Soconusco. The main commercial center of the sierra is the town of Motozintla, also near the Guatemalan border.
  The Central Depression is in the center of the state. It is an extensive semi flat area bordered by the Sierra Madre de Chiapas, the Central Highlands and the Northern Mountains. Within the depression there are a number of distinct valleys. The climate here can be very hot and humid in the summer, especially due to the large volume of rain received in July and August. The original vegetation was lowland deciduous forest with some rainforest of middle altitudes and some oaks above 1,500 m (4,900 ft) above sea level.
  The Central Highlands, also referred to as Los Altos, are mountains oriented from northwest to southeast with altitudes ranging from twelve to sixteen hundred meters above sea level. The western highlands are displaced faults, while the eastern highlands are mainly folds of sedimentary formations – mainly limestone, shale, and sandstone. These mountains, along the Sierra Madre of Chiapas become the Cuchumatanes where they extend over the border into Guatemala. Its topography is mountainous with many narrow valleys and karst formations called uvalas or poljés, depending on the size. Most of the rock is limestone allowing for a number of formations such as caves and sinkholes. There are also some isolated pockets of volcanic rock with the tallest peaks being the Tzontehuitz and Huitepec volcanos. There are no significant surface water systems as they are almost all underground. The original vegetation was forest of oak and pine but these have been heavily damaged. The highlands climate in the Koeppen modified classification system for Mexico is humid temperate C(m) and subhumid temperate C (w 2 ) (w). This climate exhibits a summer rainy season and a dry winter, with possibilities of frost from December to March. The Central Highlands have been the population center of Chiapas since the Conquest. European epidemics were hindered by the tierra fría climate, allowing the indigenous peoples in the highlands to retain their large numbers.
  The Eastern Mountains (Montañas del Oriente) are in the east of the state, formed by various parallel mountain chains mostly made of limestone and sandstone. Its altitude varies from 500 to 1,500 m (1,600 to 4,900 ft). This area receives moisture from the Gulf of Mexico with abundant rainfall and exuberant vegetation, which creates the Lacandon Jungle, one of the most important rainforests in Mexico. The Northern Mountains (Montañas del Norte) are in the north of the state. They separate the flatlands of the Gulf Coast Plains from the C
caption: Lake at the Parque Nacional Lagunas de Montebello
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