mahakam4dThe Mahakam River (Indonesian: Sungai Mahakam) is third longest and volume discharge river in Borneo after Kapuas River and Barito River, it is located in Kalimantan, Indonesia.It flowsNestled in the heart of Kalimantan, Indonesia, the Mahakam River stands as an enmatic waterway that weaves through the lush landscapes of Borneo.