The Mahakam River (Indonesian: Sungai Mahakam) is the third longest river (with the third greatest volume discharge) in Borneo after the Kapuas River and the Barito River, and is located in East Kalimantan province of Indonesia. It flows 980 kilometers (610 miles) from the district of Long Apari in the highlands of Borneo, to its mouth at the Makassar Strait. The city of Samarinda, the provincial capital of East Kalimantan, lies about 48 kilometers (30 mi) from the river mouth. The delta of the Mahakam River has a specific micro climate which is influenced by high and low tide at sea level. The southernmost branch of the delta is part of provincial border between East Kalimantan and Nusantara Capital Specific Region.
