Laguna Rogagua is a lake

Lake

A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds. Lakes can be contrasted with rivers or streams,...

 in the pampas area in the northern Bolivia

Bolivia

Bolivia officially known as Plurinational State of Bolivia , is a landlocked country in central South America. It is the poorest country in South America...

, in the José Ballivián Province

José Ballivián Province

José Ballivián is a province of the Beni Department in northern Bolivia. It is named for José Ballivián, a general and former president of Bolivia who lived from 1805 until 1852. The province has a north-south extent...

 of the Beni Department

Beni Department

Beni, sometimes El Beni, is a northeastern department of Bolivia, in the lowlands region of the country. It is the second largest department in the country , covering 213,564 square kilometers , and it was created by supreme decree on November 18, 1842 during the administration of General José...

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Laguna Rogagua and some smaller lakes are north of Santa Rosa, Beni, Bolivia, and north east of Rurrenabaque

Rurrenabaque

Rurrenabaque is a small town in the North of Bolivia on the Beni River. It is the capital of Rurrenabaque Municipality. In recent years it has become popular with international tourism as it is an easy gateway for visits to Madidi National Park , as well as the surrounding pampas...

 and Reyes, Bolivia

Reyes, Bolivia

Reyes is the city capital of the José Ballivián Province in the Beni Department of northern Bolivia and as well as of the Reyes Municipality..Reyes is located 32 kilometres from Rurrenabaque south west on the Beni River, and flights to Rurrenabaque may then be diverted to Reyes. Nuvia Montenegro,...

. Some of the popular pampas tours from Rurrenabaque go to the area of Laguna Rogagua or to the area of the Yacuma River

Yacuma River

The Yacuma River is a river in Bolivia....

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Partial and shortened translation from the Spanish Wikipedia:

Laguna (or Lago) Rogagua is a tropical Bolivian fresh water lake, located in the Amazonian river basin of the Beni Department. The Lake is 21 km in length by 9 km and has an area of 155 km² and perimeter of 52 kilometers, and is thus one of greatest lakes of Bolivia. Rogagua is an important reservoir for fresh water and wild life.