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Apar Mountains
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The Apar Mountains (Pegunungan Apar) are located in the southeastern part of Kalimantan, the Indonesian portion of Borneo, primarily within the East Kalimantan province. This mountain range is an extension of the broader Meratus mountain system and is characterized by its dense tropical rainforest cover and complex karst limestone formations. Geologically, the region is ancient, composed mainly of sedimentary rocks and limestone that have been sculpted by millennia of tropical erosion into sharp ridges and deep valleys. These mountains serve as a critical watershed for numerous rivers that sustain the agriculture and ecosystems of the fertile coastal lowlands. Within the secluded valleys of the Apar range, indigenous Dayak communities continue to practice traditional lifestyles deeply interconnected with the forest's natural resources. While the region is a biodiversity hotspot, home to rare species such as the proboscis monkey and various hornbills, it faces significant environmental pressure from large-scale coal mining operations prevalent in the surrounding areas. The rugged relief of the Apar Mountains acts as a natural barrier and a sanctuary for endangered flora and fauna amidst a rapidly industrializing landscape. Preserving these highland forests is essential for the ecological stability and water security of southeastern Borneo.
Best time to visit & climate
The most pleasant time to visit is Aug–Oct.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg °C | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 22 | 22 | 22 | 22 |
| Rain mm | 235 | 277 | 300 | 299 | 210 | 196 | 185 | 139 | 146 | 126 | 174 | 245 |
📋 Practical info
Geography
Facts
- The range is an integral part of the Meratus mountain system in Borneo.
- The relief is dominated by ancient limestone and sedimentary rock formations.
- Home to significant karst landscapes and unexplored cave systems.
- Acts as a major watershed for the river systems of the Paser Regency.
- Provides critical habitat for the endemic proboscis monkey.
- The surrounding foothills contain some of Indonesia's largest coal reserves.
- Historically inhabited by Dayak ethnic groups with unique forest traditions.
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Frequently asked questions
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Apar Mountains: where is it located?
Apar Mountains: when is the best time to visit?
Apar Mountains: why is it worth visiting?
