*The first is the Amazon Basin, also called the North Basin (/66% of the territory). The rivers of this basin generally have big meanders which form lakes such as Murillo Lake in Pando Department. The main Bolivian tributary to the Amazon basin is the Mamoré River, with a length of  running north to the confluence with the Beni River,  in length and the second most important river of the country. The Beni River, along with the Madeira River, forms the main tributary of the Amazon River. From east to west, the basin is formed by other important rivers, such as the Madre de Dios River, the Orthon River, the Abuna River, the Yata River, and the Guaporé River. The most important lakes are Rogaguado Lake, Rogagua Lake, and Jara Lake.