Barisan MountainsBarisan Mountains at a Glance
About Barisan Mountains
The Barisan Mountains are the long volcanic mountain chain forming the western spine of Sumatra island in Indonesia, running approximately 1,700 kilometres. The range includes numerous volcanoes and the island’s highest peak.
Landscape highlights include steep forested slopes, volcanic peaks and highland plateaus; the range contains several national parks and protected areas important for conservation. Mount Kerinci, the highest summit in the chain, rises to 3,805 metres.
The range formed as part of the Sunda arc where the Indo-Australian Plate subducts beneath the Eurasian Plate, producing volcanic activity and uplift over millions of years. Human use has included agriculture on the lower slopes and establishment of protected areas to conserve wildlife.
Geographically the Barisan Mountains run along Sumatra’s western coast from the Aceh region in the north to Lampung in the south, separating the narrow western coastal plain from the island’s interior. The range shapes local river systems and climate patterns across western Sumatra.
- Length: The range runs roughly 1,700 kilometres along the western spine of Sumatra and contains numerous active and dormant volcanoes.
- Climate contrast: The western slopes receive heavy rainfall and host tropical rainforest habitats, while eastern slopes grade into drier lowlands.
What to See#
- Mount Kerinci: Rises to an elevation of 3,805 metres and is the highest volcano on Sumatra, located in the central section of the range.
- Kerinci Seblat National Park: A large protected area that covers extensive portions of the range and safeguards Sumatran biodiversity including tiger, orangutan and rhino habitats.
- Volcanic arc: A UNESCO-listed biosphere zone and a corridor of active and dormant volcanoes stretching along the western side of Sumatra.
Best Time to Visit Barisan Mountains
The Barisan Mountains are best explored in the island's dry season when trails are more reliable; specific regions have microclimates.
Weather & Climate near Barisan Mountains
Barisan Mountains's climate is classified as Tropical Rainforest - Tropical Rainforest climate with consistently warm temperatures year-round. Temperatures range from 15°C to 24°C. Heavy rainfall (2558 mm/year), wettest in January.
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | Good | 15° - 23° | 19° | 316 mm | overcast | 89% | 1.7 m/s | 2.1 extreme | 12.2h |
| February | Good | 15° - 23° | 19° | 250 mm | overcast | 90% | 1.4 m/s | 2.1 extreme | 12.1h |
| March | Good | 15° - 23° | 19° | 280 mm | overcast | 89% | 1.4 m/s | 2.2 extreme | 12.0h |
| April | Good | 16° - 24° | 20° | 294 mm | overcast | 90% | 1.2 m/s | 2.1 extreme | 11.9h |
| May | Good | 16° - 24° | 20° | 184 mm | overcast | 90% | 1.2 m/s | 1.9 very high | 11.8h |
| June | Good | 15° - 23° | 19° | 110 mm | overcast | 90% | 1.6 m/s | 1.8 very high | 11.8h |
| July | Very Good | 15° - 23° | 19° | 91 mm | overcast | 89% | 1.7 m/s | 1.8 very high | 11.8h |
| August | Good | 15° - 23° | 19° | 109 mm | overcast | 88% | 1.3 m/s | 1.9 very high | 11.9h |
| September | Good | 15° - 23° | 19° | 159 mm | overcast | 87% | 1.6 m/s | 1.9 very high | 12.0h |
| October | Good | 16° - 23° | 19° | 228 mm | overcast | 87% | 1.5 m/s | 1.9 very high | 12.1h |
| November | Good | 16° - 23° | 19° | 259 mm | overcast | 89% | 1.2 m/s | 2.0 very high | 12.2h |
| December | Good | 16° - 23° | 19° | 278 mm | overcast | 90% | 1.4 m/s | 2.0 very high | 12.2h |
How to Get to Barisan Mountains
The range runs the length of western Sumatra. Access points depend on which section is of interest: Medan and Bukittinggi serve northern and central sections; Padang and Bengkulu for southern areas. Internal flights and long-distance buses connect to regional towns.
Tips for Visiting Barisan Mountains
- Use the Barisan spine as a route marker when travelling Sumatra north-south - the range is long and regions vary in accessibility.
- If trekking volcanic sections (Kerinci, Marapi), hire experienced local guides familiar with weather and trail conditions.
- Check national park rules and permits for protected areas such as Bukit Barisan Selatan and Kerinci Seblat.