Gunung Leuser National Park Park

Gunung Leuser National Park is a large protected rainforest area on the island of Sumatra in Indonesia and forms a central part of the wider Leuser Ecosystem, a significant conservation landscape for Southeast Asian wildlife.

The park’s draws include guided jungle treks, orangutan-spotting in riverine forest, and long-range trekking routes into mountainous interior zones. Popular access points such as Bukit Lawang offer short to multi-day treks and wildlife viewing; longer routes from Ketambe and other stations lead deeper into primary forest.

Created to protect diverse lowland and montane rainforest habitats, the park has been managed for conservation and research while facing pressures from surrounding land use changes. Ongoing conservation efforts focus on habitat protection and species recovery.

Geographically the park spans parts of northern Sumatra and includes lowland rainforest, peat swamp and mountain terrain; access is typically from towns on Sumatra’s north coast and from local riverine entry points.

• Wildlife and conservation: The park is one of the main remaining habitats for Sumatran orangutans and is also home to tigers, elephants and other threatened Sumatran wildlife, so guided treks and responsible operators are recommended.

What to See#

• Bukit Lawang gateway: Bukit Lawang on the park’s northern edge serves as the most frequented visitor gateway and base for guided jungle treks and orangutan-watching excursions.
• Ketambe and interior stations: Ketambe and other research and ranger stations provide entry points for longer treks into the park’s interior and are bases for conservation research and guided wildlife tours.

Fly into Medan (Kualanamu International Airport) and then travel by road to the Bukit Lawang gateway village (Langkat Regency), the most common access point for visits to Gunung Leuser National Park. Bukit Lawang is about 80 km north of Medan and typically takes around 3-4 hours by car or shared minivan; minivans and buses depart regularly from Medan’s city terminals. From Bukit Lawang village it’s a short 5-15 minute walk to the park entrance and riverfront trailheads used for jungle treks.

• Aim for early morning treks during the dry season (roughly May-September) when wildlife is most active and river crossings are safer; late afternoons can also be productive but expect more visitors.
• Use the well-established Bukit Lawang entrance if your goal is a short-day orangutan trek and choose Ketambe or the more remote Suaq Balimbing areas for quieter, multi-day jungle experiences and higher chances of solitary wildlife sightings.
• Book a licensed local guide and your park permits/entrance fees in advance and check recent river and trail conditions - guides know safe crossing points, current leech activity and where patrols are operating, which makes multi-day routes far more reliable and rewarding.