Kayan Mentarang National Park Park

Borneo national park protecting rainforests and indigenous communities

On Indonesian Borneo's borderlands, Kayan Mentarang National Park protects lowland rainforest, river valleys and Dayak communities; adventurous visitors arrange multi‑day treks, river travel and cultural visits with local guides.

Main image
A soft shell turtle in Kayan Mentarang National Park.jpg
Across Tubu River in Kayan Mentarang National Park.jpg
Big trees in Kayan Mentarang National Park.jpg
Boat A.JPG
Cross a bride in Lalut Birai Research Station.jpg
Gas Station A.JPG
People transporting gasoline by boat.JPG
River Stone A.JPG
River Stone B.JPG
River Stone D.JPG

Kayan Mentarang National Park at a Glance#

About Kayan Mentarang National Park#

Kayan Mentarang National Park is a large protected area on the Indonesian side of Borneo (Kalimantan) that protects mountain ranges, river valleys and extensive rainforest habitats. The park is recognised for its biodiversity, remoteness and presence of indigenous communities.

The landscape comprises steep forested mountains, river systems and lowland forests that support a wide range of flora and fauna typical of Borneo. The area is used for low-impact traditional activities by local peoples and is also a destination for remote trekking and biodiversity research.

The park was established to conserve these montane and lowland ecosystems and to protect the cultural heritage of resident indigenous groups; access is often by long overland or river routes from regional towns.

  • Cultural and ecological values: Contains extensive tracts of lowland and montane tropical rainforest and is home to indigenous Dayak communities who continue traditional lifestyles within protected zones.

Tips for Visiting Kayan Mentarang National Park#

  • Kayan Mentarang is remote and best experienced on multi-day treks arranged with local, village-based guides-organize permits and logistics in advance through reputable operators.
  • Plan for the dry season (roughly May-September) when trails and river crossings are more reliable; routes often use village trails and basic campsites, so coordinate with guides about itinerary and supplies.

Best Time to Visit Kayan Mentarang National Park#

For easier access and drier trekking conditions, aim for the dry season (May-September); the park is hot and humid year-round.

Dry season
May-September · 24-32°C
Generally the best time for trekking and river travel - lower rainfall, easier trails and better access to remote areas.
Wet season
October-April · 24-30°C
Heavy, frequent rains increase river levels and can make trails muddy or impassable; access to some areas may be limited.

Weather & Climate near Kayan Mentarang National Park#

Climate

Kayan Mentarang National Park's climate is classified as Tropical Rainforest - Tropical Rainforest climate with consistently warm temperatures year-round. Temperatures range from 20°C to 29°C. Heavy rainfall (2536 mm/year), wettest in December.

Air Quality: AQI 49 Good
Best Time to Visit
AugustSeptemberJuly
Temperature & Rainfall
Temperature Range
38°
Warmest Month
17°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Good 21° - 28° 24° 307 mm overcast 89% 0.8 m/s 2.1 extreme 12.2h
February Good 21° - 28° 25° 283 mm overcast 89% 0.9 m/s 2.2 extreme 12.1h
March Good 21° - 29° 25° 310 mm overcast 88% 0.9 m/s 2.2 extreme 12.0h
April Good 21° - 29° 25° 236 mm overcast 88% 0.9 m/s 2.2 extreme 11.9h
May Good 21° - 29° 25° 213 mm partly cloudy 89% 0.9 m/s 2.0 very high 11.8h
June Very Good 21° - 29° 25° 156 mm partly cloudy 90% 1.0 m/s 1.8 very high 11.8h
July Very Good 20° - 28° 24° 142 mm partly cloudy 89% 0.9 m/s 1.8 very high 11.8h
August Very Good 20° - 29° 24° 109 mm partly cloudy 86% 1.2 m/s 2.1 extreme 11.9h
September Very Good 20° - 29° 25° 122 mm partly cloudy 83% 1.3 m/s 2.2 extreme 12.0h
October Good 21° - 29° 25° 135 mm overcast 82% 1.2 m/s 2.1 extreme 12.1h
November Good 21° - 29° 25° 212 mm overcast 85% 0.9 m/s 2.1 extreme 12.2h
December Good 21° - 28° 25° 311 mm overcast 88% 0.9 m/s 2.0 extreme 12.2h