The Mahakam River is one of the longest rivers in Indonesia, stretching approximately 920 kilometers. It flows through the eastern part of the island of Borneo, primarily in the province of East Kalimantan. The river is vital for transportation and trade, serving as a key waterway for local communities and industries. The Mahakam River is also known for its rich biodiversity, including various fish species and unique wildlife. It supports the livelihoods of many indigenous peoples, such as the Dayak tribes, who rely on the river for fishing and agriculture. The river's ecosystem is crucial for maintaining the region's environmental balance.