{{Infobox river | name = Cautário River | native_name ={{native name|pt|Rio Cautário}} | name_other = | etymology = | image = Cautario2.JPG | image_size = | image_caption = Cautário River in the dry season | image_alt = | map = | pushpin_map = Brazil | pushpin_map_caption= <!---------------------- BASIN --> | river_system = Guaporé River | progression = | source1_location = Rondônia state | source1_coordinates= | source1_elevation = | mouth_location = Guaporé River | mouth_coordinates = {{coord|-12.211400|-64.595044|display=inline,title}} | mouth_elevation = | altitude_difference= | basin_size = | subdivision_type1 = Country | subdivision_name1 = Brazil | basin_cities = <!---------------------- PHYSIOGNOMY --> | length = | width_min = | width_avg = | width_max = | depth_min = | depth_avg = | depth_max = | discharge1_location= | discharge1_min = | discharge1_avg = | discharge1_max = <!---------------------- FEATURES --> | tributaries_left = | tributaries_right = | waterbodies = | waterfalls = }} The '''Cautário River''' ({{langx|pt|Rio Cautário}}) is a river of Rondônia state in western Brazil. It is a right tributary of the Guaporé River.

==Course==

The Cautário River rises in the Uru-Eu-Wau-Wau Indigenous Territory. It is fed by streams from the {{convert|650|m}} Serra Uopianes and the {{convert|750|m}} Serra Pacaás Novos.{{sfn|Unidade de Conservação ... MMA}} The river runs in a southwest direction, forming the boundary between the Rio Cautário Federal Extractive Reserve and the Rio Cautário State Extractive Reserve.{{sfn|RESEX do Rio Cautário – ISA |loc=Informações gerais (mapa)}} It flows into the Guaporé/Mamoré river, which in turn feeds the Madeira River at the city of Nova Mamoré.{{sfn|Unidade de Conservação ... MMA}}

The Cautário River has clear waters fed by a region without major deforestation and silting of the river's margins. It has rapids, but always with a drop of less than {{convert|2|m}}. These include Bom Destino, Desengano, Esperança and Cujubim. The most rugged stretch is between Redenção e Bom Destino. It is navigable, even in the middle section around Bom Destino, but only in the rainy season. During the dry season the river bed has extensive sandbanks.{{sfn|Unidade de Conservação ... MMA}}

==See also== *List of rivers of Rondônia

==References== {{reflist|30em}}

{{commons category|Rio Cautário}}

==Sources== {{refbegin}} *{{citation|ref={{harvid|RESEX do Rio Cautário – ISA}}|language=Portuguese |title=RESEX do Rio Cautário|publisher=ISA: Instituto Socioambiental |url=https://uc.socioambiental.org/uc/5300|accessdate=2016-09-14}} *{{citation|ref={{harvid|Unidade de Conservação ... MMA}}|language=Portuguese |title=Unidade de Conservação: Reserva Extrativista do Rio Cautário|publisher=MMA: Ministério do Meio Ambiente |url=http://sistemas.mma.gov.br/cnuc/index.php?ido=relatorioparametrizado.exibeRelatorio&relatorioPadrao=true&idUc=238|accessdate=2016-09-15}} {{refend}}

{{DEFAULTSORT:Cautario River}} Category:Rivers of Rondônia