North Sumatra Loop in Lake Toba
Part of the Lake Toba travel guide — see every topic in All Lake Toba Guides.
Lake Toba works best as one leg of a North Sumatra circuit rather than a destination on its own, because two other things sit within a few hours of the road between it and Medan: Bukit Lawang, on the edge of the Gunung Leuser National Park, where wild and semi-wild Sumatran orangutans are trekked to in genuine rainforest, and Berastagi in the Karo highlands, a cool market town between two volcanoes. Together they make a loop of seven to ten days from Medan.
Bukit Lawang
A village on the Bohorok river at the edge of Gunung Leuser National Park, three to four hours from Medan, and the most accessible place in the world to trek to Sumatran orangutans. A rehabilitation centre operated here for decades and its released animals and their descendants live semi-wild in the surrounding forest, alongside a genuinely wild population. Treks run from a few hours to several days with guides and porters, and also turn up Thomas's leaf monkeys, gibbons, macaques and hornbills. The Sumatran orangutan is critically endangered, with the whole population in Aceh and North Sumatra.
Berastagi and the Karo highlands
Two hours from Medan at around 1,300 metres, a cool market town on the fertile volcanic plateau, famous for its fruit and flower market and sitting between two volcanoes. Sibayak, at 2,212 metres, is a straightforward two-hour climb to a steaming crater and is one of the more accessible active volcanoes in Indonesia. Sinabung, opposite, reawakened in 2010 after four centuries and erupted repeatedly through the decade, killing people and displacing tens of thousands — it is closed and the exclusion zone is real. The Karo Batak villages nearby have their own distinctive house architecture.
The northern lake
Between Berastagi and Toba, the road passes the Sipiso-piso waterfall, which drops around a hundred and twenty metres off the caldera rim into the Toba basin, with a viewpoint looking down the length of the lake — one of the best views in Sumatra. Nearby, the Simalem Resort area and the Karo highlands give further caldera-rim viewpoints. This stretch is genuinely spectacular and is usually done as a stop on the drive between Berastagi and Parapat rather than as a destination.
Doing the loop
The standard route is Medan to Bukit Lawang for two or three nights of trekking, back through Medan or across country to Berastagi for two nights, then south past Sipiso-piso to Parapat and across to Samosir for three or four nights, and back to Medan or out from Silangit. Seven to ten days. Roads are winding and slow throughout; a car with driver at 700,000–1,200,000 rupiah a day makes it far easier than piecing together shared minibuses, though those exist and are cheap.
North Sumatra Loop at a glance
| Orangutans | Bukit Lawang, 3–4 h from Medan — Gunung Leuser NP |
|---|---|
| Status | Sumatran orangutan is critically endangered |
| Highlands | Berastagi, ~1,300 m, between two volcanoes |
| Climbable | Sibayak, 2,212 m, ~2 h; Sinabung is closed and dangerous |
| Best view | Sipiso-piso waterfall, ~120 m, over the lake |
| The loop | 7–10 days from Medan |