The Jaguarão or Yaguarón River ( pt, Rio Jaguarão, es, Río Yaguarón) is a Brazilian and

Uruguay Uruguay (; ), officially the Oriental Republic of Uruguay ( es, República Oriental del Uruguay), is a country in South America. It shares borders with Argentina to its west and southwest and Brazil to its north and northeast; while bordering ...

an river. It forms the border between

and

Rio Grande do Sul Rio Grande do Sul (, , ; "Great River of the South") is a Federative units of Brazil, state in the South Region, Brazil, southern region of Brazil. It is the Federative_units_of_Brazil#List, fifth-most-populous state and the List of Brazilian st ...

state in southernmost

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

. The river originates in

Serras de Sudeste Serras de Sudeste (English: ''Southeastern Mountain Ranges'') is a dissected plateau, also named Planalto Dissecado de Sudeste (''Southeastern Dissected Plateau'') or Escudo Sul-Rio-Grandense (''Shield of Rio Grande do Sul''), located in the sou ...

(Southeastern Mountain Ranges) and flows east to empty into

Lagoa Mirim Lagoon Mirim (Portuguese, ) or Merín (Spanish, ) is a large estuarine lagoon which extends from southern Rio Grande do Sul state in Brazil into eastern Uruguay. Lagoa Mirim is separated from the Atlantic Ocean by a sandy, partially barren isthmu ...

(

Portuguese Portuguese may refer to: * anything of, from, or related to the country and nation of Portugal ** Portuguese cuisine, traditional foods ** Portuguese language, a Romance language *** Portuguese dialects, variants of the Portuguese language ** Portu ...

) /

Laguna Merín Lagoon Mirim (Portuguese, ) or Merín (Spanish, ) is a large estuarine lagoon which extends from southern Rio Grande do Sul state in Brazil into eastern Uruguay. Lagoa Mirim is separated from the Atlantic Ocean by a sandy, partially barren isth ...

(

Spanish Spanish might refer to: * Items from or related to Spain: **Spaniards are a nation and ethnic group indigenous to Spain **Spanish language, spoken in Spain and many Latin American countries **Spanish cuisine Other places * Spanish, Ontario, Cana ...

), which is a large coastal lagoon which is indirectly connected to the

Atlantic Ocean The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe ...

Navigability

The river is navigable as far up as the town of

Jaguarão Jaguarão () is a municipality in the southern Brazilian state of Rio Grande do Sul located on the shores of the Jaguarão River, bordering Uruguay. It lies a short distance inland from the Mirim Lagoon. Geographical and historical proximity to ...

. Regarding its navigability, vessels sailing on the nearby Mirim Lagoon are by treaty under Brazilian jurisdiction.

Navigability

See also