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 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.
Kayan Mentarang National Park
-3.1528, 115.5069

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.

Best Time to Visit
AugustSeptemberJuly
Temperature & Rainfall
Temperature Range
38°
Warmest Month
17°
Coldest Month
Monthly Conditions

January

January is warm with muggy conditions (dew point 22°C). Heavy rain (307 mm) and mostly overcast skies.

63 Good

Comfort

24°
Feels Like Warm
24°C
Temperature
21° 28°
89%
Humidity
Very Humid

Weather

307 mm
Rainfall
0.8 m/s
Wind
Calm
2.1
UV Index
Extreme
12.2h daylight

February

February is warm with muggy conditions (dew point 22°C). Heavy rain (283 mm) and mostly overcast skies.

63 Good

Comfort

25°
Feels Like Warm
25°C
Temperature
21° 28°
89%
Humidity
Very Humid

Weather

283 mm
Rainfall
0.9 m/s
Wind
Calm
2.2
UV Index
Extreme
12.1h daylight

March

March is warm with muggy conditions (dew point 23°C). Heavy rain (310 mm) and mostly overcast skies.

63 Good

Comfort

25°
Feels Like Warm
25°C
Temperature
21° 29°
88%
Humidity
Very Humid

Weather

310 mm
Rainfall
0.9 m/s
Wind
Calm
2.2
UV Index
Extreme
12.0h daylight

April

April is the warmest month with muggy conditions (dew point 23°C). Heavy rain (236 mm) and mostly overcast skies.

65 Good

Comfort

25°
Feels Like Warm
25°C
Temperature
21° 29°
88%
Humidity
Very Humid

Weather

236 mm
Rainfall
0.9 m/s
Wind
Calm
2.2
UV Index
Extreme
11.9h daylight

May

May is the warmest month with muggy conditions (dew point 23°C). Heavy rain (213 mm) and partly cloudy skies.

69 Good

Comfort

25°
Feels Like Warm
25°C
Temperature
21° 29°
89%
Humidity
Very Humid

Weather

213 mm
Rainfall
0.9 m/s
Wind
Calm
2.0
UV Index
Very High
11.8h daylight

June

June is warm with muggy conditions (dew point 22°C). Significant rainfall (156 mm) and partly cloudy skies.

71 Very Good

Comfort

25°
Feels Like Warm
25°C
Temperature
21° 29°
90%
Humidity
Very Humid

Weather

156 mm
Rainfall
1.0 m/s
Wind
Calm
1.8
UV Index
Very High
11.8h daylight

July

July is warm with highs of 28°C and lows of 20°C. Significant rainfall (142 mm) and partly cloudy skies.

73 Very Good

Comfort

24°
Feels Like Warm
24°C
Temperature
20° 28°
89%
Humidity
Very Humid

Weather

142 mm
Rainfall
0.9 m/s
Wind
Calm
1.8
UV Index
Very High
11.8h daylight

August

August is warm with highs of 29°C and lows of 20°C. Significant rainfall (109 mm) and partly cloudy skies.

75 Very Good

Comfort

24°
Feels Like Warm
24°C
Temperature
20° 29°
86%
Humidity
Very Humid

Weather

109 mm
Rainfall
1.2 m/s
Wind
Calm
2.1
UV Index
Extreme
11.9h daylight

September

September is warm with highs of 29°C and lows of 20°C. Significant rainfall (122 mm) and partly cloudy skies.

75 Very Good

Comfort

25°
Feels Like Warm
25°C
Temperature
20° 29°
83%
Humidity
Very Humid

Weather

122 mm
Rainfall
1.3 m/s
Wind
Calm
2.2
UV Index
Extreme
12.0h daylight

October

October is the warmest month with highs of 29°C and lows of 21°C. Significant rainfall (135 mm) and mostly overcast skies.

69 Good

Comfort

25°
Feels Like Warm
25°C
Temperature
21° 29°
82%
Humidity
Very Humid

Weather

135 mm
Rainfall
1.2 m/s
Wind
Calm
2.1
UV Index
Extreme
12.1h daylight

November

November is warm with muggy conditions (dew point 22°C). Heavy rain (212 mm) and mostly overcast skies.

63 Good

Comfort

25°
Feels Like Warm
25°C
Temperature
21° 29°
85%
Humidity
Very Humid

Weather

212 mm
Rainfall
0.9 m/s
Wind
Calm
2.1
UV Index
Extreme
12.2h daylight

December

December is warm with muggy conditions (dew point 23°C). The wettest month with heavy rain (311 mm) and mostly overcast skies.

63 Good

Comfort

25°
Feels Like Warm
25°C
Temperature
21° 28°
88%
Humidity
Very Humid

Weather

311 mm
Rainfall
0.9 m/s
Wind
Calm
2.0
UV Index
Extreme
12.2h daylight

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