The River of Doubt

Old map of Brazil, highlighting location of River of Doubt
Map of Brazil

Library of Congress

Formerly called the Rio da Dúvida (River of Doubt), today, the tributary to the Aripuanã River, running a length of 760 km (470 mi), is named Rio Teodoro (Roosevelt River) after Theodore Roosevelt. It was mapped during the Roosevelt-Rodon Expedition in 1914-1915, after Theodore's failed bid for a third term Presidency. Theodore Roosevelt recounts the trip in the book he authored: Into the Brazilian Wilderness.

Last updated: May 8, 2021

Park footer

Contact Info

Mailing Address:

28 East 20th Street
New York, NY 10003



Contact Us