General information The area of Durango is ; this accounts for about 6.3% of the entire territory of Mexico. It is the fourth largest state, lying at the extreme northwest of the
Central Mexican Plateau, where it meets the
Sierra Madre Occidental—the highest peaks in the state. The state has an average elevation of 1,775 meters above sea level, with a mean elevation of 1,750 m in the Valleys region and 2,450 m in the Sierra region. The
city of Durango is on the foothills of the Sierra Madre Occidental, with an elevation of 1,857 m. Durango is landlocked, bordered by
Chihuahua,
Coahuila,
Zacatecas,
Nayarit and
Sinaloa. based on the 1917
Constitution of Mexico, and several additional divisions have been made since. The
Sierra Madre Occidental blocks moisture from the Pacific Ocean, impacting the local climate of the state. Las Quebradas region, located over the mountain chain and on the northwest of the state, has a
humid subtropical climate. Excepting the highest elevations, the rest of the state has
semi-arid and
temperate climates. It is hot and dry in the East, with some temperate areas existing at higher elevations. Many rivers begin in Durango, but lead into other Mexican states. Some of these rivers empty into the Pacific, or into the lake area of La Comarca, while one, the Florida, flows into the Gulf of Mexico.
Ecological regions Ecologically, the state is divided into four regions: La Quebrada, the Sierra, the Valleys and the Semi-desert. The area is relatively flat with some mountain ranges and a slight incline towards the interior of the country. The area was at one time under the sea, but today the vegetation consists of scrub,
nopal cactus,
maguey plants,
barrel cactus and other arid zone plants. It is defined by two rivers: the
Nazas and the
Aguanaval. The region has two reservoirs: the
Lázaro Cárdenas (Palmito) and the
Francisco Zarco (Tórtolas), located between the Cuencamé and Lerdo municipalities. Animals that can be found here include
coyotes,
gavilanes (
sparrowhawks), various
snakes,
owls,
chameleons,
tarantulas and
scorpions. Most of the economically important natural resources come from mining, including deposits of
gold,
silver,
iron and
mercury. There are also large deposits of marble. The area is home to Durango's only caverns. The Rosario Caves (grutas) are located near
Ciudad Lerdo, as well as the
Mapimí Biosphere, noted for various plants and the desert tortoise. It is a highly protected area centering on where the states of Chihuahua, Coahuila and Durango meet. The
Valleys are located in the center of the state and include the municipalities of
Nombre de Dios,
Durango,
Nuevo Ideal,
Canatlán,
Guadalupe Victoria,
Pánuco de Coronado,
Poanas,
Súchil,
Vicente Guerrero,
Ocampo,
San Bernardo,
Indé,
Coneto de Comonfort,
El Oro,
Rodeo,
San Juan del Río and
Peñón Blanco. The region consists principally of river valleys and plains located among small mountain ranges. The main peaks in this area include the San Jacinto in the Silla Mountains and Peñon Blanco, which many schoolchildren in the area take trips to. Other major geographical formations in the Valleys Region include cliffs called Las Catedrales, along with those called Malpaís and La Breña, which were formed by lava flows over 250,000 hectares. The area is also home to the Cerro de Mercado which is important for its large deposit of
iron. The valleys proper are flat and suitable for farming, with irrigation from the
Nazas, Florido and Tunal Rivers. Reservoirs for this purpose include the Santiaguillo, Guatimapé and Refugio Salcido. It has large areas with grass,
huizache,
sabinos and
poplar trees. There is a shallow wetland area called the Guatimapé, or Santiguillo. It provides vital habitat for flocks of migrating birds in winter, especially
cranes,
geese and
ducks. Around this lake, there are
Mennonite communities who are noted for their cheeses and cured meats. The region also provides habitat for coyotes, rabbits, squirrels, foxes, geese and ducks. The rivers contain fish such as catfish, bass, carp and tilapia. The area also has hot springs due to tectonic activity. The best known springs are the Zape, Atotonilco and the Hervideros. The area is home to the state capital of
Durango and many former haciendas that attest to the area's agricultural history. The
Sierra region is in the west of the state. It includes the municipalities of
Guanaceví,
Tepehuanes, and parts of
Santiago Papasquiaro,
Topia,
Canelas,
Otáez,
Tamazula,
San Dimas,
Pueblo Nuevo,
Mezquital,
Durango,
Ocampo and
San Bernardo. The terrain is rugged with freezing temperatures in the winter and snow in the higher elevations. There is also a rainy season in the summer. The vegetation in the Sierra region is mostly
pine–oak forest, consisting of
pines,
oak,
cedar, and
strawberry trees as well as
grasslands. The fauna includes
deer,
pumas,
coyotes,
foxes,
badgers and
wild turkeys. Fish such as
bass and
catfish are found in the rivers, along with various species of birds and reptiles. Most of the state's rivers originate in the mountains of this region.
Las Quebradas is found in the far west of the state, including parts of
Mezquital,
Pueblo Nuevo,
San Dimas,
Otáez,
Santiago Papasquiaro,
Tamazula,
Topia,
Canelas and
Tepehuanes. The region is subdivided by the rugged, western flank of the Sierra Madre. The terrain features deep ravines, canyons and fast-flowing rivers. The
Humaya,
Tamazula, Los Remedios,
Piaxtla,
Presidio, and
Baluarte rivers flow west to the Pacific through the state of Sinaloa. Further south, the
Acaponeta,
San Pedro Mezquital, and
Huaynamota rivers flow southwest through the state of Nayarit. The region, especially its ravines and canyons, is hot and humid. It receives the most rainfall in the state. There is greater diversity of flora and fauna in its rainforests compared to the desert regions of the state. Animal species include pumas, white-tailed deer, armadillos, badgers, iguanas and a large number of bird species. At higher elevations, between 600 and 1200 meters, the vegetation changes to pine forests and the climate is more temperate. This area has had the most human habitation and agriculture. When the Jesuits arrived to the Quebradas, they introduced the grazing of cattle and large-scale farming of corn, sugar cane and fruit trees. In the hotter and wetter areas, they introduced bananas, cherimoyas,
guavas, zapotes, plums, avocados, oranges and other types of citrus. However, the difficulty of crossing the mountains to the more prosperous Valleys region limited the economy here. Las Quebradas has mineral deposits, principally silver with some gold. Most of these deposits are found in an area that extends from the Humaya River to San Diego. During the 18th century, a number of royal mines were in operation here. They have been worked intermittently since them, with the last major activity in the late 19th and early 20th century. The deposits attracted Europeans, displacing the native
Acaxes,
Xiximes and other indigenous groups, whose numbers fell with the introduction of European diseases. Many of the towns in this area including Félix de Tamazula, Valle de Topia, Santa Veracruz de Topia, Nuestra Señora de la Asunción de Siánori, Santa María de Otáez and San José de Canelas began as mining towns. The mountains over 3,000 meters above sea level are dominated by dramatic landscapes, including waterfalls, old-growth pine forests and ravines, such as the Basís Quebrada on the Presidio River. The sinkholes and rock formations, such as the El
Espinazo del Diablo, are visible from the old highway to Mazatlan. It is one of the most representative landscapes of northwest Mexico. Cerro Gordo is the highest point in the state and is considered sacred to both the
Tepehuanes and the
Huichol people. This area is home to the
La Michilía Biosphere Reserve, which is a pioneer for the reintroduction of the
critically endangered Mexican grey wolf. The Tecuan National Forest is in the Quebradas. ==Economy==