Geography and environment
View of the volcanoes from Carrizalillos Lake
La Audiencia Beach in Manzanillo
The state covers a territory of 5,455 km2 and is the fourth smallest federal entity after
Morelos and the
Federal District of Mexico City, containing only 0.3% of the country's total territory.
 The state is in the middle of
Mexico’s Pacific coast, bordered by the Pacific Ocean and the states of
Colima’s territory includes the
Revillagigedo Islands—Socorro, San Benedicto, Clarión, and Roca Partida. These are under federal jurisdiction but are considered part of the municipality of
Politically, the state is divided into ten
 Natural geography divides the state into a northern and southern region. The north has a cooler climate due to the higher mountains. The south is hotter and includes the Pacific Ocean coastline. The Revillagigedo Islands, of volcanic origin, are dispersed along the 19° north parallel over an area of about 400 km2—with a total landmass of 205 km2.
The altitude varies from sea level to 3,839 m (12,595 ft) at the crater of the
Volcán de Colima.
The state is in an offshoot of the
Sierra Madre Occidental mountain range and geographically consists of four mountain systems. The most important of these is the Cerro Grande and its related peaks of Jurípicho-Juluapan, Los Juanillos, La Astilla, El Ocote, El Peón, El Barrigón, San Diego, and La Media Luna. The second consists of mountain chains parallel to the coast between the Marabasco and Armería Rivers, which include El Espinazo del Diablo, El Escorpión, El Tigre, El Aguacate, El Centinela, El Tora and La Vaca. The third is located between the Armería and Salado Rivers and includes the Alcomún y Partida, San Miguel y Comala and San Gabriel/Callejones peaks. The last is between the Salado and Naranjo or Coahuayana Rivers and contains small mountain chains such as the Piscila, Volcancillos, La Palmera, El Camichín and Copales. Three quarters of the state is covered by mountains and hills.
At the very north of the state, the border is marked by two volcanoes. The
Colima Volcano, also called the Volcán de Fuego, is active and the
Nevado de Colima is not. The Nevado de Colima is taller at 4,271 m (14,013 ft) and gives its name to the national park that surrounds it. The Colima Volcano, 3825 m (12,549 ft), has a pyramidal peak, in contrast to the other, which has been leveled somewhat.
 The last major eruptions of the Colima Volcano occurred in 1998 and 1999.
The main rivers of the state are the Cihuatlán (also called the Chacala, Marabasco, or Paticajo—which forms the state’s border with Jalisco on the west; the Armería, which descends from the Sierra de Cacoma and crosses the state north-south into the Pacific, and the Coahuayana River. The Salado is another important river, which flows entirely within Colima before emptying into the Coahuayana. Many of the state’s streams and arroyos empty into the Salado.
Colima has a relatively short coastline, at 139 km (1.2% of Mexico’s total). It extends from the Boca de Apiza to the Cerro de San Francisco in front of
Barra de Navidad, Jalisco .
lagoons include the Potrero Grande in Manzanillo along with the Miramar and the San Pedrito. On the Tecomán municipality coast there are the lagoons of Alcuzahua and Amela, with the Cuyutlán lagoon split between the municipalities of Armería and Manzanillo. Inland, there are various fresh water lakes, with the larger ones near the coast and smaller ones in the
Valley of Colima. The valley lakes are fed by the runoff from the Colima Volcano and include the Carrizalillo, Las Cuatas, El Jabalí, El Calaboso, La María and La Escondida.
The predominant climate is hot and relatively moist, with the coast particularly moist. One exception is the
Tecomán municipality where the climate is dry and very hot. The mildest climates are in the municipalities of
Cuauhtémoc. On the coast, the average temperature varies from between 24 and 26 C and inland, at the highest elevations, the temperature averages between 20 and 22 C.
Cropland covers 27% of the state’s territory, with another 28% dedicated to pasture. Forest covers 35% with the rest composed of bodies of water and urban areas. Most wild vegetation in the west of the state consists of moderately
deciduous rainforest of medium height. Plants that lose leaves do so in the dry season. These include commercially important trees such as
red cedar, caobilla (
Couratara guianensis), parota (
Enterolobium cyclocarpum)—and trees locally known as primavera, rosa morada, habillo, payolo, pelillo, barsino, and salatón. From the west of Manzanillo and into the municipalities of
Coquimatlán, there is rainforest of medium height with tree species such as copal (
Bursera) and cuajilote (
Parmentiera aculeate), with some pines,
holm oaks and salt friendly
mangrove forests and scrub.
There is great diversity of wildlife species although a number of mammal species such as
wild boar and deer are disappearing. Among the state’s rodents is the
Xenomis nelson, a small rare animal little known outside Colima. Bird species include wild turkeys, although these have mostly disappeared, and a bird called the
chachalaca. A number of ducks and other migratory birds pass through. Reptiles include crocodiles, with a nursery in Tecomán dedicated to their survival.