Sierra Madre is a mountain range (located at 15.5°N 92.6°W) which runs northwest-southeast from the state of
ChiapasChiapas officially Estado Libre y Soberano de Chiapas is one of the 31 states that, with the Federal District, comprise the 32 Federal Entities of Mexico. It is divided in 118 municipalities and its capital city is Tuxtla Gutierrez. Other important cites in Chiapas include San Cristóbal de las...
in
MexicoThe United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...
across
GuatemalaGuatemala is a country in Central America bordered by Mexico to the north and west, the Pacific Ocean to the southwest, Belize to the northeast, the Caribbean to the east, and Honduras and El Salvador to the southeast...
and into
El SalvadorEl Salvador or simply Salvador is the smallest and the most densely populated country in Central America. The country's capital city and largest city is San Salvador; Santa Ana and San Miguel are also important cultural and commercial centers in the country and in all of Central America...
and
HondurasHonduras is a republic in Central America. It was previously known as Spanish Honduras to differentiate it from British Honduras, which became the modern-day state of Belize...
. Most of the
volcano2. Bedrock3. Conduit 4. Base5. Sill6. Dike7. Layers of ash emitted by the volcano8. Flank| 9. Layers of lava emitted by the volcano10. Throat11. Parasitic cone12. Lava flow13. Vent14. Crater15...
es of Guatemala are a part of this range.
A narrow coastal plain lies south the range, between the Sierra Madre and the
Pacific OceanThe Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the Americas in the east.At 165.2 million square kilometres in area, this largest division of the World...
. To the north lie a series of highlands and depressions, including the Chiapas Depression, which separates the Sierra Madre from the Chiapas Plateau, the
Guatemalan HighlandsThe Guatemalan Highlands is an upland region in southern Guatemala, lying between the Sierra Madre de Chiapas to the south and the Petén lowlands to the north....
, and Honduras' interior highlands.
It is known near Guatemala city as the Sierra de las Nubes, and enters Mexico as the Sierra de Istatan. Its summit is not a well-defined crest, but is often rounded or flattened into a table-land. The direction of the great volcanic cones, which rise in an irregular line above it, is not identical with the main axis of the Sierra itself, except near the Mexican frontier, but has a more southerly trend, especially towards El Salvador; here the base of many of the igneous peaks rests among the southern foothills of the range. It is, however, impossible to subdivide the Sierra Madre into a northern and a volcanic chain; for the volcanoes are isolated by stretches of comparatively low country; at least thirteen considerable streams flow down between them, from the main watershed to the sea. Viewed from the coast, the volcanic cones seem to rise directly from the central heights of the Sierra Madre, above which they tower; but in reality their bases are, as a rule, farther south. East of
Volcán TacanaThe Tacaná Volcano is the second highest peak in Central America at . It is located in the Tacaná municipality of the Guatemalan department of San Marcos, and in Cacahoatán Municipality and Unión Juárez Municipality in the Mexican state of Chiapas....
(4,092 meters) which marks the Mexican frontier, the principal volcanoes are
TajumulcoVolcán Tajumulco is a large stratovolcano in the department of San Marcos in western Guatemala. It is the highest mountain in Guatemala and Central America at...
(4,220 meters); Santa Maria (3,777 meters), which was in eruption during 1902, after centuries of quiescence, in which its slopes had been overgrown by dense forests;
AtitlanVolcán Atitlán is a large, conical, active stratovolcano adjacent to the caldera of Lake Atitlán in the Highlands of Guatemala. The volcano has been quite active historically, with more than a dozen eruptions recorded between 1469 and 1853, the date of its most recent eruption. Atitlán is part of...
(3,557 meters), overlooking Lake Atitlan;
AcatenangoAcatenango is a stratovolcano in Guatemala, close to the city of Antigua. The volcano has two peaks, Pico Mayor and Yepocapa which is also known as Tres Hermanas...
(3,976 meters);
FuegoVolcán de Fuego is an active stratovolcano in Guatemala. It is close to the city of Antigua Guatemala. It has erupted frequently since the Spanish conquest. "Fuego" is famous for being almost constantly active at a low level. Smoke issues from its top daily, but larger eruptions are rare. On...
(i.e. "fire," 3,763 meters), which received its name from its activity at the time of the Spanish conquest;
AguaVolcán de Agua is a stratovolcano located in the department of Sacatepéquez in Guatemala. It has been inactive since the mid 16th century. At 3,760 metres, Agua Volcano towers more than 3,500 metres above the Pacific coastal plain to the south and 2,000 metres above the Guatemalan...
(i.e. "water," 3,765 meters), so named in 1541 because it destroyed the former capital of Guatemala with a deluge of water from its flooded crater; and
PacayaPacaya is an active complex volcano in Guatemala, which first erupted approximately 23,000 years ago and has erupted at least 23 times since the Spanish conquest of Guatemala. Pacaya rises to an elevation of . After being dormant for a century, it erupted violently in 1965 and has been...
(2,550 meters), a group of igneous peaks which were in eruption in 1870. East of the Guatemalan border, the range forms the boundary between El Salvador and Honduras. In El Salvador, the volcanoes form a line well south of the range, where over twenty volcanoes form five clusters. Between the Sierra Madre and the Volcanic line lies a central plateau.
The Sierra forms the main watershed between the Pacific and Atlantic river systems. On the Pacific side of the Sierra the distance to the sea is short, and the streams, while very numerous, are consequently small and rapid. A few of the streams of the Pacific slope actually rise in the Guatemalan Highlands, and force a way through the Sierra Madre at the bottom of deep ravines. On the eastern side a number of the rivers attain a very considerable development.