Hulu Mahakam

The upper Mahakam rises in the mountains of central Borneo and flows eastward through steep forested country. Tributaries gather along its course before the river reaches the broader lowlands and lakes downstream. Kayan and Kenyah communities moved through the headwaters of the Mahakam and neighboring rivers, crossing the interior ranges into other basins. The river links this highland world to the coast of eastern Borneo.