Leuser RangeLeuser Range at a Glance
About Leuser Range
The Leuser Range is a mountainous region in northern Sumatra, Indonesia, primarily within Aceh province, that forms the backbone of the Leuser Ecosystem. It includes extensive tracts of tropical rainforest that transition from lowland jungle to montane forests at higher elevation.
Large parts of the range are protected within Gunung Leuser National Park and related reserves and constitute critical habitat for a suite of endangered species, notably the Sumatran orangutan, Sumatran tiger, rhinoceros and elephant. The area is a focus for conservation, scientific research and guided eco-tourism such as jungle treks and wildlife observation.
Historically the forests have supported local communities through subsistence use, and in more recent decades conservation authorities and NGOs have worked to establish and manage protected areas to curb deforestation and protect biodiversity. Access into core rainforest areas typically requires permits and organised guides.
The Leuser Range sits in northern Sumatra, Indonesia, spanning parts of Aceh and adjacent provinces and forming part of the island’s Barisan mountain chain.
- Biodiversity: Home to critically endangered species including the Sumatran orangutan, Sumatran tiger, Sumatran rhinoceros and Asian elephant, making it a global biodiversity hotspot.
What to See#
- Gunung Leuser National Park: Contains Gunung Leuser National Park, a core protected area within the Leuser Ecosystem that preserves lowland and montane rainforest and key wildlife habitat.
Best Time to Visit Leuser Range
Best visited in the drier months for overland treks; wildlife sightings may vary seasonally and by elevation.
Weather & Climate near Leuser Range
Leuser Range's climate is classified as Oceanic - Oceanic climate with consistently warm temperatures year-round. Temperatures range from 7°C to 18°C. Heavy rainfall (2697 mm/year), wettest in October.
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | Acceptable | 7° - 17° | 12° | 208 mm | overcast | 83% | 2.5 m/s | 2.0 extreme | 11.8h |
| February | Acceptable | 7° - 18° | 13° | 162 mm | overcast | 82% | 2.3 m/s | 2.3 extreme | 11.9h |
| March | Acceptable | 7° - 18° | 13° | 257 mm | overcast | 83% | 2.2 m/s | 2.3 extreme | 12.0h |
| April | Acceptable | 8° - 18° | 13° | 232 mm | overcast | 85% | 1.7 m/s | 2.2 extreme | 12.1h |
| May | Acceptable | 8° - 18° | 13° | 198 mm | overcast | 83% | 2.1 m/s | 2.1 extreme | 12.2h |
| June | Acceptable | 7° - 18° | 13° | 125 mm | overcast | 81% | 2.9 m/s | 2.1 extreme | 12.2h |
| July | Acceptable | 7° - 17° | 12° | 220 mm | overcast | 81% | 2.8 m/s | 2.0 extreme | 12.2h |
| August | Acceptable | 7° - 17° | 12° | 205 mm | overcast | 82% | 2.0 m/s | 2.1 extreme | 12.1h |
| September | Acceptable | 7° - 17° | 12° | 256 mm | overcast | 83% | 2.2 m/s | 2.1 extreme | 12.0h |
| October | Acceptable | 8° - 17° | 12° | 298 mm | overcast | 84% | 1.9 m/s | 1.9 very high | 11.9h |
| November | Acceptable | 8° - 17° | 12° | 281 mm | overcast | 86% | 2.0 m/s | 1.9 very high | 11.8h |
| December | Acceptable | 7° - 17° | 12° | 255 mm | overcast | 85% | 2.4 m/s | 1.9 very high | 11.8h |
How to Get to Leuser Range
Access points are typically reached from Banda Aceh or local towns such as Kutacane. Roads into Aceh can be long; most visitors travel by car or motorbike and then proceed on foot. For organized treks and permit arrangements, book through reputable conservation NGOs or licensed guides in Aceh.
Tips for Visiting Leuser Range
- Hire a local guide with proven jungle experience - the Leuser Range is rugged and conditions change quickly.
- Arrange permits and river transport in advance when planning multi-day treks; parts of the range are in conservation zones.
- Be prepared for heavy rain at any time; pack dry bags for electronics and permits.