Hulu Seruyan

The upper Seruyan lies in the forested interior of southern Borneo, beneath the Schwaner Mountains where the river rises. From these hills the Seruyan runs south through a broad basin towards the Java Sea. Its course joins the upland streams to the lower river country and the coast, crossing landscapes that change from rugged hills to flat, wet lowlands. The river and its tributaries form the principal natural routes through this heavily wooded region.