Madeira River

The fourth one in Top 9 Longest Rivers in Bolivia that Toplist wants to introduce to you is Madeira River. The Madeira River is a major South American waterway. It is estimated to be 1,450 km (900 mi) long, whereas the Madeira-Mamoré is estimated to be around 3,250 km (2,020 mi) or 3,380 km (2,100 mi) in length, depending on the measuring party and their methods. The Madeira is the Amazon's largest tributary, accounting for approximately 15% of the water in the basin.

The Madeira River is turbid due to high sediment levels and is whitewater, as is typical of Amazonian rivers with primary headwaters in the Andes, but some of its tributaries are clearwater (e.g., Aripuanã and Ji-Paraná) or blackwater (e.g., Manicoré).

The upper Madeira River system is home to the Bolivian river dolphin, which is either a subspecies of the Amazon river dolphin or a separate species. The Madeira River Basin is thought to have over 900 fish species, making it one of the world's richest freshwater systems in terms of species richness.

Length: 1,450 km (900 mi- shared with Brazil)