Honduras's geography: a trough that splits the mountains in two

How a lowland trough splits the Honduran mountains

Where the highest ground lies

Mountains make up about 80% of Honduras by the reckoning of the Wikipedia geography article, and Britannica puts the mountainous share at more than three-fourths. The interior is a dissected upland of many small peaks.

The trough is what gives that upland its order. It begins at the Caribbean, widest at its northern end near San Pedro Sula, narrows as it follows the upper course of the Río Humuya, passes through Comayagua and the narrow passes south of the city, and widens again along the border with El Salvador until it reaches the Gulf of Fonseca. It divides the cordilleras into an eastern and a western part, and it gives a relatively easy route from one sea to the other.

The two halves are unequal. West of the trough the mountains blend into the ranges of Guatemala and carry the high peaks: Pico Congolón at 2,500 metres and Cerro Las Minas, which Britannica measures at 2,849 metres and the Wikipedia article gives as 2,850 in its text and 2,870 in its statistics table. The border with El Salvador crosses the summit of Cerro El Pital, at over 2,730 metres. East of the trough the ranges merge with those of Nicaragua and run generally lower, though Montaña de la Flor reaches 2,300 metres, Pepe Bonito 2,435 and El Boquerón 2,485.

The cover changes across the same line. Much of the western, southern and central mountains is open woodland, pine with some oak, scrub and grassy clearings between the trunks. The eastern ranges are mostly continuous dense broadleaf evergreen forest. Around the highest peaks there are still remnants of the dense rainforest that once covered much more of the interior.

What the highland soils are made of

Between the ranges lie flat-floored valleys of varying size. The Wikipedia article places them at 300 to 900 metres and Britannica at 600 to 1,200. Their floors carry enough grass, shrubs and dry woodland for livestock and, in places, commercial farming, while subsistence farming has been pushed onto the valley slopes. The towns sit in the larger valleys. Tegucigalpa stands in one at 975 metres by Britannica's figure, a gold- and silver-mining centre founded in 1578. Comayagua, inside the trough itself, held the capital until 1880, when it moved to Tegucigalpa.

The sources disagree about the ground under those valleys. Britannica calls the south-western mountains the Volcanic Highlands, built of alternating layers of dark volcanic detritus and lava flows between about 2.6 and 65 million years old, and describes the northern mountains as more ancient, with granite and crystalline rock predominating. It calls the central highland soils generally fertile, derived from lava and volcanic ash, and lists coffee, tobacco, wheat, maize and beans among what they grow.

The Wikipedia geography article reads the same interior the other way. Its soil is poor, it says, because Honduras lacks the rich volcanic ash found in other Central American countries, and until the early 20th century the highland economy consisted mainly of mining and livestock. The Wikipedia economy article repeats the point and adds a measure of the cost: by 1987 about 750,000 hectares of Honduran land had been seriously eroded by cattle ranching and slash-and-burn cultivation.

Why the Sula Valley holds the Caribbean ports

The Caribbean coast runs 700 kilometres, from the mouth of the Río Motagua in the west to the mouth of the Río Coco at Cape Gracias a Dios in the east. Most Hondurans call it "the north coast", or simply "the coast". East of La Ceiba the coastal plain is only a few kilometres wide. On either side of that stretch it widens and runs far inland along broad river valleys, and the broadest of them is the valley of the Ulúa, near the Guatemalan border.

The Ulúa flows 400 kilometres to the Caribbean through the Valle de Sula, and the northern mouth of the trough opens onto the same valley. Puerto Cortés and San Pedro Sula both stand here, and La Ceiba lies further east along the coast. Before the Spanish arrived the Sula Valley was the core of the Mesoamerican culture area in what is now Honduras.

Britannica divides the country into four regions, and its figures show how much of the population this one strip carries.

The railways explain the rest. Plans for a railway joining the Caribbean and Pacific coasts date from the 1850s. In 1888 a line projected from the Caribbean towards Tegucigalpa ran out of money when it reached San Pedro Sula, and the town grew into the country's industrial centre. By 1902 railways ran along the Caribbean coast for the banana trade, and by 1912 United Fruit held concessions for a line from Tela to Progreso in the Sula Valley and another from Trujillo inland to Juticalpa. Britannica still finds the national rail network concentrated in this region, along with four of the principal ports: Puerto Cortés, Tela, Puerto Castilla and La Ceiba.

The household survey of the national statistics institute, the INE, estimated 1,175,313 people in the Distrito Central around Tegucigalpa and 688,053 in San Pedro Sula in July 2025, and Britannica describes the northern city as equally important industrially and commercially.

What La Mosquitia keeps at the eastern end

How the eastern savanna floods

Near the Nicaraguan border the Caribbean lowlands broaden into La Mosquitia, an inland savanna with swamps and mangrove towards the coast. In heavy rain much of the savanna lies under shallow water, and travel by anything other than a shallow-draft boat becomes almost impossible. Average rainfall there reaches 2,400 millimetres a year. Several large brackish lagoons open onto the Caribbean and allow limited transport along the shore.

Britannica sets out the cover from the sea inwards. Mangrove and palm forest stand in the coastal and lagoon swamps. Behind them come low, rainy, sandy plains of Caribbean pine savanna, Pinus caribaea, extending 65 kilometres or more inland. Beyond the savanna, on the lower mountains, belts of dense evergreen broadleaf forest hold mahogany, lignum vitae, Spanish cedar, balsa, rosewood and ceiba.

This end of the coast belonged to a different world from the Sula Valley before the conquest: it was the core of the Isthmo-Colombian culture area, as the Sula Valley was of the Mesoamerican. Part of it joined Honduras late: in 1960 the International Court of Justice transferred the northern part of what was the Mosquito Coast from Nicaragua to Honduras. FILAC, the regional fund for indigenous peoples, cites INE figures for 2013 counting 80,007 Miskitu, 90% of them in the department of Gracias a Dios, which it identifies with La Mosquitia.

Why the Río Plátano reserve is listed in danger

The Río Plátano Biosphere Reserve covers 350,000 hectares of La Mosquitia and protects the whole watershed of the Río Plátano, from the headwaters to the river mouth. Its granite mountains rise to Punta Piedra at 1,418 metres, with a 150-metre pinnacle at Pico Dama and a waterfall of the same height. The foothills begin abruptly at about 100 metres, and below them the river meanders for some 45 kilometres across a coastal plain of recent marine sediments and infertile Pleistocene quartz gravels, forming ox-bow lakes and backwater swamps. Laguna Brus and Laguna Ibans lie along the coast.

Protection began with archaeology. A Ciudad Blanca Archaeological Reserve was created in 1960 and reclassified as an archaeological national park in 1969; the biosphere reserve was decreed in 1980 and extended in 1997, and UNESCO inscribed it on the World Heritage List in 1982. UNESCO's statement of the site's value records more than 721 vertebrate species, including more than half of all mammals known in Honduras, and 411 species of birds.

The site has been on the List of World Heritage in Danger since 1996, with a break between 2007 and 2011. The IUCN World Heritage Outlook assessed its conservation outlook as critical in 2025, citing logging, conversion to pasture and the Patuca III hydroelectric plant, in commercial operation as of 2024 with no impact assessment completed of the kind the World Heritage guidance asks for. The Honduran government reports that the project complies with its environmental mitigation measures.

Where Honduras meets the Pacific at Fonseca

The Pacific coast is 153 kilometres long and lies entirely on the Gulf of Fonseca, the southern apex of a country shaped roughly like a triangle. The Pacific lowlands behind it are a strip averaging 25 kilometres wide on the north shore of the gulf, flat and swampy near the water and built mostly of alluvium washed down from the mountains. The gulf is shallow and rich in fish and molluscs, and the root networks of the shoreline mangroves make shrimp and shellfish abundant.

The Choluteca River runs south from Tegucigalpa through the city of Choluteca and out into the gulf, at the southern end of the same trough that opens at the Caribbean.

The gulf islands are volcanoes. Zacate Grande and El Tigre, the two largest it holds, are eroded volcanoes belonging to the chain that runs down the Pacific side of Central America, and both carry cones more than 700 metres high that ships use as landmarks entering Honduran waters. Exposición is the third.

Ownership of the gulf took a court case to settle. After the war of 1969, Honduras and El Salvador signed a peace treaty in Lima on 30 October 1980 and agreed to send their dispute over the gulf and five sections of the land boundary to the International Court of Justice. In 1992 the Court awarded most of the disputed land to Honduras, around 374.5 square kilometres, found that El Tigre was Honduran and that Meanguera and Meanguerita were Salvadoran. El Salvador accepted the judgment in 1999.

Where rivers draw the Honduran borders

The land borders are the other two sides of the triangle. The south-eastern side, with Nicaragua, follows the Río Coco inland from the Caribbean and then runs south-west through mountains to the Gulf of Fonseca. The western side is split between El Salvador and Guatemala. Rivers define about half of all the international borders: the Coco marks about half the Nicaraguan frontier, and the Goascorán and the Lempa mark part of the Salvadoran one.

The lengths depend on who measured them. The Wikipedia geography article gives one set in its text and another in a statistics section built on material it credits to the World Factbook's 2025 edition, and they do not agree.

Water is plentiful and standing water is scarce. Numerous rivers drain the interior highlands north to the Caribbean, and they matter less as transport routes than for the broad fertile valleys they have built. Lago de Yojoa, in the west-central highlands, is the sole natural lake, 22 kilometres long and 14 kilometres across at its widest. More than 400 species of birds live there, and the lake is polluted by heavy metals from local mining.

The World Factbook figures put total renewable water resources at 95.93 cubic kilometres in 2011, and withdrawal at 2.12 cubic kilometres a year in its 2006 figures, 61% of it for agriculture. The government's own planning follows the drainage: the 16 development regions of the Visión de País 2010 to 2038 framework were drawn on its river basins and on socio-economic variables, and the third national climate communication of 2018 used them as its units.

How height and the north wind set Honduran weather

Temperature here follows elevation more closely than season. Land below 1,000 metres is known as tierra caliente, hot land; from 1,000 to 2,000 metres it is tierra templada; above 2,000 metres it is tierra fría, where nights can fall to near freezing and frost sometimes forms. Both coastal lowlands are hot land, with daytime highs averaging between 28 and 32 degrees Celsius through the year.

Rain falls year round on the Caribbean side and only seasonally elsewhere. The interior highlands and the Pacific lowlands have a dry season from November to April that Hondurans call "summer", and almost all their rain falls in the "winter" from May to September. Britannica gives the ranges: 1,800 to 2,800 millimetres a year or more on the northern and eastern plains, 1,500 to 2,000 on the Pacific plains, and 1,000 to 1,800 in the sheltered interior basins. Tegucigalpa, in its sheltered valley, averages about 1,000 millimetres.

The climate baseline built for the third national communication on climate change, from station records for 1981 to 2010, adds detail. The rains begin in May and end in November, with a midsummer dip called the canícula or veranillo in July and August across the centre and south. Mean temperatures in December, the coolest month, run from 8 degrees Celsius high in the Sierra de Celaque to 28 on the southern plains, and in April, the warmest, from 10 to 31. The Valle de Sula is hottest in June, because the rains reach the north-west only in that month.

On the north coast the one relief from year-round heat is the norte, an occasional cold front from the north in December or January that brings several days of strong north-west wind. The same report projects deficits in the wettest quarter, June to August, against the 1981 to 2010 normal, changes in annual rain of between minus 10% and plus 20%, and rises in maximum temperature of up to 1.5, 2.0 and 4.5 degrees Celsius by the end of the century under the RCP 2.6, 4.5 and 8.5 scenarios.

What Hurricane Mitch did to Honduran ground

The Caribbean coast lies in the hurricane belt and takes storms that travel inland from the sea. Hurricane Fifi in 1974 killed more than 8,000 people and destroyed nearly the entire banana crop.

Mitch formed over the south-western Caribbean on 22 October 1998 and strengthened to Category 5, with a central pressure of 905 millibars, on 26 October, according to the United States weather satellite service, NOAA NESDIS. It came ashore in Honduras as a much weaker Category 1 storm. The damage came from the rain. About 100,000 people were evacuated from the Caribbean coast, rivers overflowed to an extent the United Nations called unprecedented in the century, and two earthflows struck near Tegucigalpa.

The Honduran government's count, as a Congressional Research Service report of October 1999 records it, was 5,657 people killed, 8,052 missing, 11,762 injured and around 1.9 million affected. About 70,000 houses were damaged, more than 92 bridges destroyed, and the banana industry lost some 90% of its plants while the staple food crops suffered less. The Inter-American Development Bank put total damage at about 3.6 billion dollars in 1999, 56% of it in agriculture, livestock, fisheries and forestry.

The terrain decided where the damage fell. Aerial surveys after the storm found mudslides worse in deforested areas than in forested ones, and the Congressional Research Service report found the floods and slides made worse by years of environmentally destructive agricultural practice. Hurricanes Eta and Iota followed in late 2020, disrupting the lives of four million Hondurans and causing some 1.9 billion dollars of damage by Britannica's account.

Which islands Honduras holds in the Caribbean

Christopher Columbus reached the Bay Islands near Guanaja on 30 July 1502, landed on the mainland near Trujillo on 14 August, and named the country Honduras, "depths", for the deep water off its coast. Roatán, Utila and Guanaja make up the Islas de la Bahía, one of the 18 departments. Roatán measures 50 by 5 kilometres.

The islands carry a history of their own. The Pech settled Guanaja before the conquest. British colonisation was particularly strong on the islands after Britain declared a protectorate over much of the coast in 1740, until the Spanish regained them in the 1780s, and banana exports began in the Bay Islands in the 1870s before small and middling farmers took them up on the mainland. The Bay Islands National Marine Park was declared on 10 June 2010 and covers 647,153 hectares of coral reef, seagrass and wetland across the municipalities of Utila, Roatán, Santos Guardiola and Guanaja. It forms part of the Mesoamerican Reef, which Honduras shares with Mexico, Belize and Guatemala.

Further out lie the Islas Santanillas, formerly the Swan Islands, which the United States handed over on 22 November 1971 under the Treaty of the Swan Islands; Honduras began exercising sovereignty on 1 September 1972. Misteriosa Bank and Rosario Bank, 130 to 150 kilometres north of them, fall inside the exclusive economic zone, which the World Factbook figures put at 249,542 square kilometres in 2025.

Why the Honduran forest keeps losing ground

The FAO counted a loss of 59,000 hectares of Honduran forest a year between 1990 and 2000. Global Forest Watch, working from Landsat imagery, reports cumulative tree cover loss of 1,475,120 hectares from 2001 to 2024, about 19.1% of a 2000 tree cover extent of 7,740,497 hectares, and its dataset leaves out regrowth.

The loss is uneven. Logging clears forest in Olancho, and clearing for agriculture advances in La Mosquitia, where the Río Plátano reserve loses forest to pasture. Tropical dry forests have been cleared faster than other forest types.

Numerous parks and reserves were established in the late 1980s and the 1990s. La Tigra National Park, created in 1980, covers 238 square kilometres of cloud forest near Tegucigalpa. Mount Bonito National Park, from 1987, covers 1,125 square kilometres, and a park of more than 155 square kilometres was established the same year around the Maya ruins of Copán near the Guatemalan border. Cuero y Salado was declared a protected forest in 1987 and Isopo Point in 1992.