Mount Mulu Mountain

Limestone massif in Borneo, famous for caves

At the heart of Sarawak's Gunung Mulu area, Mount Mulu anchors rainforest trails, cave systems and canopy walks; visitors combine trekking with spelunking and biodiversity observation.

Main image
1996 Mulu 04.jpg
1996 Mulu 05.jpg
Aeschynanthus tricolor in Mulu National Park, 25.8.2025.jpg
Camp 5 Gunung Mulu National Park 2.jpg
Camp 5 Gunung Mulu National Park.jpg
Caves of Mulu (32172276551).jpg
Daring Tourists going on a boat trip under a rainstorm (14950068584).jpg
Forest Brook after the rain ... (23383455950).jpg
Fumigation against mosquitoes (15594117662).jpg
Garden Bungalow (15434632249).jpg

Mount Mulu at a Glance#

Address: Gunung Mulu National Park, Miri Division, Sarawak, Malaysia

Website: https://www.mulupark.gov.my/

Admission: Park entrance and permit fees apply; Mulu park fees vary for foreigners (check latest government site)

About Mount Mulu#

Mount Mulu is a prominent peak within Gunung Mulu National Park in Sarawak, Malaysian Borneo. The park is internationally recognised for its karst caves and rich tropical biodiversity.

The mountain forms part of the park’s montane zone and is visited by hikers using established trails that connect lowland rainforest to higher-elevation forest types. The wider park is home to major cave systems such as Deer Cave and Clearwater Cave and supports diverse flora and fauna.

The mountain and surrounding park have been the focus of biological exploration and conservation due to the high species diversity and distinctive karst topography. Access is organised from the Mulu park headquarters and village; travel normally involves boat or small aircraft to the park followed by guided treks.

Mount Mulu sits in northern Sarawak on the island of Borneo, within a protected national park boundary characterised by steep limestone and sandstone terrain and dense tropical forest.

  • Protected area and caves: Located within Gunung Mulu National Park, a protected area in Sarawak noted for extensive cave systems and karst features. The park contains some of the world’s largest cave passages and rich lowland-to-montane rainforest.

How to Get to Mount Mulu#

Gunung Mulu National Park is reached primarily by small plane from Miri or Kuching to Mulu Airport, followed by short transfers to the park headquarters. Some longer river routes exist but are less commonly used by international visitors.

Tips for Visiting Mount Mulu#

  • Reserve flights and the park entrance permit well in advance - access is limited and the park controls visitor numbers.
  • Bring a headlamp for cave trips; even guided tours through Deer Cave and Clearwater require solid lighting.
  • Expect sudden tropical downpours in the afternoon; waterproof cases for gear are sensible.

Best Time to Visit Mount Mulu#

March-September is generally the best period for trekking and cave visits; wet months can limit access.

Dryer Season
Mar-Sep · 24-32°C
More predictable weather for trails and cave visits.
Wet Season
Oct-Feb · 23-30°C
Heavier rains and higher water in caves; some trails may be restricted.

Weather & Climate near Mount Mulu#

Climate

Mount Mulu's climate is classified as Oceanic - Oceanic climate with consistently warm temperatures year-round. Temperatures range from 12°C to 21°C. Heavy rainfall (2869 mm/year), wettest in November, distributed fairly evenly throughout the year.

Air Quality: AQI 53 Moderate
Best Time to Visit
FebruaryJulyMarch
Temperature & Rainfall
Temperature Range
30°
Warmest Month
16°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Acceptable 13° - 20° 16° 212 mm overcast 91% 2.1 m/s 2.0 extreme 11.8h
February Acceptable 12° - 20° 16° 183 mm overcast 90% 1.9 m/s 2.3 extreme 11.9h
March Acceptable 12° - 21° 17° 229 mm overcast 90% 1.7 m/s 2.5 extreme 12.0h
April Acceptable 13° - 21° 17° 269 mm overcast 91% 1.9 m/s 2.5 extreme 12.1h
May Acceptable 13° - 21° 17° 282 mm overcast 91% 1.9 m/s 2.2 extreme 12.2h
June Acceptable 13° - 21° 17° 216 mm overcast 91% 1.8 m/s 2.1 extreme 12.3h
July Acceptable 13° - 20° 16° 182 mm overcast 90% 1.7 m/s 2.1 extreme 12.2h
August Acceptable 13° - 20° 17° 203 mm overcast 89% 2.2 m/s 2.2 extreme 12.2h
September Acceptable 13° - 20° 16° 260 mm overcast 89% 2.0 m/s 2.2 extreme 12.0h
October Acceptable 13° - 20° 16° 278 mm overcast 91% 1.8 m/s 2.1 extreme 11.9h
November Acceptable 13° - 20° 17° 290 mm overcast 92% 2.0 m/s 2.0 extreme 11.8h
December Acceptable 13° - 21° 17° 265 mm overcast 92% 1.8 m/s 2.0 very high 11.7h

Nearby Attractions to Mount Mulu#