El Merendón

El Merendon Water Production Zone is a protected highland watershed area in Cortes department, northwestern Honduras, encompassing the forested Merendon mountain range that rises sharply above San Pedro Sula and the surrounding Sula Valley lowlands. Designated as a water production zone under Honduras's protected area system by Legislative Decree No. 46-90 on July 12, 1990, its primary purpose is to safeguard the hydrological functions of the Merendon massif, which provides freshwater to San Pedro Sula and numerous other communities in the Cortes Valley. ^[1] The zone originally covered 39,976.71 hectares; Decree 334-2013 reduced this to approximately 37,377 hectares by excluding certain settled communities. The mountains create a dramatic topographic backdrop to San Pedro Sula, with peaks reaching approximately 2,200 meters above sea level.

The Merendon forests support significant biodiversity concentrated on the moist Caribbean slopes and cloud forest ridges. Baird's tapir and pumas inhabit the upper forest zones, while white-tailed deer, peccaries, coati, and kinkajous are more widespread. Ocelots and margays are present in areas with sufficient forest cover. The avifauna reflects the Caribbean slope gradient, with toucans, woodpeckers, motmots, and a diverse understory community. The Merendon is particularly noted among birders for the occurrence of range-restricted species associated with the Sierra de Omoa-Merendon mountain chain. Stream systems support freshwater fish assemblages and river otters.

Vegetation transitions dramatically from the Sula Valley lowlands through foothill forests to cloud forest and elfin forest on the highest ridges. Lower slopes support tropical humid forest with ceiba, mahogany, tropical cedar, and cohune palm. Middle elevations from 800 to 1,500 meters are dominated by mixed broadleaf forest with increasing epiphyte diversity including orchids, bromeliads, and mosses. Above 1,500 meters, cloud forest develops with liquidambar, oaks, Podocarpus, and dense fern and moss cover. The upper elfin forest on exposed ridge crests features dwarf windswept trees and high density of bryophytes. The Merendon's forest is one of the last substantial forest blocks in the heavily industrialized Cortes department, providing critical habitat connectivity. ^[1]

The Merendon range is an eastward extension of the Sierra de Omoa, a fault-bounded block of Paleozoic metamorphic and intrusive igneous rocks thrust upward relative to the Caribbean coastal plain. The mountains are composed of phyllites, schists, quartzites, and granitic intrusives, overlain by deep lateritic soils on upper slopes. The range's abrupt western escarpment, rising steeply from the Sula Valley floor, reflects active tectonics along the Sula graben fault system. This structural setting makes the range prone to landslides, particularly on deforested slopes during heavy rainfall events associated with tropical storms. Stream incision is vigorous, producing narrow gorges and waterfalls on rivers descending toward the Sula Valley.

The Merendon experiences a humid tropical climate strongly influenced by orographic effects. The Caribbean-facing slopes intercept moisture from trade winds and tropical weather systems, producing very high annual rainfall often exceeding 3,000 to 4,000 mm with no true dry season. The valley-facing western slopes are significantly drier, receiving 1,500 to 2,000 mm annually. Temperatures vary with elevation: the Sula Valley averages 28 to 32 degrees Celsius, while upper cloud forest zones maintain 12 to 18 degrees Celsius. Cloud and fog are persistent at elevations above 1,500 meters throughout the year. Tropical storms and hurricanes periodically deliver extreme rainfall; Hurricane Mitch in 1998 and Hurricane Eta in 2020 caused devastating floods in the Sula Valley below, highlighting the critical water-regulation function of upslope forests.

The Cortes Valley and adjacent Merendon foothills were inhabited by Chort Maya and Lenca peoples in pre-Columbian times. Spanish colonization established cattle ranches and mining operations in the region during the 16th and 17th centuries. The late 19th and early 20th centuries brought banana plantation development along the valley floor, with the United Fruit Company and Standard Fruit Company establishing major operations that transformed the Sula Valley economy. San Pedro Sula grew rapidly as an industrial and commercial center during the 20th century, expanding toward the foot of the Merendon. Migration to the city from rural Honduras has continued, with informal settlements creeping up the lower Merendon slopes.

El Merendon was designated a Water Production Zone under Honduran Legislative Decree No. 46-90, enacted on July 12, 1990, originally covering 39,976.71 hectares. ^[1] The designation acknowledged that the forest's value lies principally in its hydrological services rather than purely biological conservation. The San Pedro Sula municipal water system and the national water utility (SANAA) have been instrumental in advocating for and maintaining the protection status. Decree 334-2013 later reduced the protected area by excluding over 2,500 hectares of settled communities, leaving approximately 37,377 hectares formally protected. In 2025, ICF proposed reclassifying the zone as a National Park, a measure that has faced significant public opposition from civil society and water security advocates. ^[2]

The Merendon is accessible from San Pedro Sula via several road and trail entries on the western face of the range. The community of Las Vegas de Mojiman and other foothills settlements serve as informal trailheads. Hiking trails ascend through secondary forest to primary forest and cloud forest zones, with spectacular panoramic views of San Pedro Sula and the Sula Valley from upper ridges. Birdwatching is excellent along the forest-agricultural boundary and in intact forest patches. A number of waterfalls and swimming holes on descending streams provide informal recreation for local residents and visitors. Guided forest tours can be arranged through community organizations with ICF authorization.

The zone is exceptionally accessible from San Pedro Sula, Honduras's second largest city with international airport connections, located at the base of the range. Urban transit and taxis reach foothills communities at the park boundary within 30 to 45 minutes of downtown San Pedro Sula. There are no formal visitor centers or entrance facilities. Informal guides from communities along the lower Merendon can accompany visitors. The city of San Pedro Sula offers comprehensive accommodation, restaurants, and services at all price points. The dry season from December through April provides the best hiking conditions, though upper cloud forest can be explored year-round.

The zone faces ongoing pressure from encroachment by informal settlements expanding upslope from San Pedro Sula, agricultural clearing, and illegal timber extraction. Deforestation on steep slopes directly threatens water quality and flood regulation capacity; surface water from El Merendon supplies approximately 20 to 25 percent of San Pedro Sula's water needs, while the zone provides critical recharge for the aquifer supplying approximately 80 percent of the city's groundwater. ^[1] Climate change projections suggest increased rainfall variability and more intense precipitation events in northern Honduras, heightening the flood-mitigation value of intact upland forest. Restoration of deforested corridors connecting forest patches is a priority to maintain wildlife movement and hydrological function. Payment for ecosystem services schemes linking urban water utility revenues to upslope community forest stewardship have been piloted in the region.