page_title: Baja California Sur
section_title: Natural geography
hierarchical_section_title: Baja California Sur / Geography and environment / Natural geography
caption_attribution_description: English: 180° Panorama on Playa Santispac of Bahía Concepción, Baja California Sur. Several islands are visible in the bay: (left to right) Isla San Ramon, Isla Blanca, and Isla Coyote. On the right is Playa Concepcion with its associated developments visible. Photo by Gregg M. Erickson.
context_page_description: Baja California Sur, officially the Estado Libre y Soberano de Baja California Sur, is the second-smallest Mexican state by population and the 31st admitted state of the 32 states which make up the 32 Federal Entities of Mexico.
  Before becoming a state on October 8, 1974, the area was known as the El Territorio Sur de Baja California. It has an area of 73,909 km², or 3.57% of the land mass of Mexico, and occupies the southern half of the Baja California Peninsula, south of the 28th parallel, plus the uninhabited Rocas Alijos in the Pacific Ocean. It is bordered to the north by the state of Baja California, to the west by the Pacific Ocean, and to the east by the Gulf of California. The state has maritime borders with Sonora and Sinaloa to the east, across the Gulf of California.
  The state is home to the tourist resorts of Cabo San Lucas and San José del Cabo. Its largest city and capital is La Paz.
context_section_description: The state is on a narrow peninsula which broke away from the mainland about two million years ago due to tectonic activity. The territory is primarily mountains or mountain ranges and coastal plains. The mountain ranges parallel the coastline and are of volcanic rock. The local name for the main mountain range is the Sierra de la Giganta and the highest peak is the Sierra de la Laguna at 2080m above sea level. The coastal plains are significantly wider on the Pacific side, averaging about 40 km, with much wider plains such as those of Santa Clara, Berrendo and Magdalena y Hiray. These areas are dominated by sedimentary rock, especially limestone of marine origin.
  The state is divided into five regions: Central Desert, La Serranía, the Vizcaíno Desert, the Magdalena Plains and Los Cabos. The Central Desert has desert plants, with vegetation springing up during short and irregular rains. The La Serranía is the high mountain areas with significant tree cover, some species of which are commercially valuable. The Vizcaíno Desert runs along the Pacific coast around the Ojo de Liebre and San Ignacio lagoons; it contains lower mountain ranges such as the San Francisco, San Alberto, Las Tinajas de Murillo and El Serrucho, along with the El Azufre and Las Vírgenes volcanos. The Magdalena Plains is a large, flat area near the Pacific coast, and the Los Cabos region is distinguished by microclimates determined by the geologic change in the area and rain patterns.
  The climate of the state is dry, with an average annual temperature of 18–22 °C and average annual rainfall of less than 200mm. The lower elevations are the driest and hottest, with summer daytime temperatures above 40 °C; wintertime temperatures may fall below freezing. The exception to desert conditions is the Los Cabos region, classified as semi-moist because of Pacific hurricane activity which affects the region. In the spring, prevailing winds are from the west and in the summer from the south and southwest. In the fall, they are from the northwest and in the winter from the north and northwest.
  Most of the surface water is in the form of seasonal streams, which are fast-flowing and only active during stormy weather. Most of these drain into the Pacific Ocean, with a number flowing south into the Bahía de Ballenas.
  The main geological feature of the state is its coastline which measures 2230 km, making it Mexico's longest with 22% of the total. It also has the most islands, mostly in the Gulf of California. There are three in the Pacific, Natividad, Magdalena and Santa Margarita (the largest). In the Gulf of California, they include San Marcos, Coronados, Carmen, Montserrat, Santa Catalina, Santa Cruz, San Diego, San Jose, San Francisco, Partida, Espiritu Santo and Cerralvo. Major bays include Sebastian Vizcaino, Magdalena, La Paz, Asunción, Ballenas, Concepcion and San Carlos. Estuaries and lagoons including those at Puerto Escondido, Nopoló, Blandra as well as the San José estuary at Cabo Colorado, the San Ignacio Lagoon and the Ojo de Liebre.
  The ecological system here is considered to be recently evolved with a number of endemic species. The lower elevations are dominated by desert and arid condition plants. This includes the world's largest species of cactus, the cardón cactus, which can reach heights of 15m. Other plant species include mesquite, chironola, lechuguilla, nopal and barrel cactus, choyas, paloadan and pitahaya. The higher elevations have forests of pine and holm oak with some deciduous forests, with leaves falling in the dry season, generally no taller than fifteen meters. Wildlife in the desert areas is restricted to birds, reptiles and small to medium mammals such as rabbits and coyotes. Upper elevations with more vegetation can have wild sheep, pumas and other wild cats, raccoons, deer, and foxes. Marine species include whales, seals, dolphins, gray whales, manta rays and sea turtles.
  National parks and other protected areas include the Sebastian Vizcaino Bay, the San Ignacio Lagoon, the Sierra la Laguna, Laguna Ojo de Liebre and the islands in th
caption: Playa Santispac on Bahía Concepción
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