Mahakam River

River in Kalimantan, Indonesia

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.

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