Lake Rosario, also known as the Laguna del Toro Negro (Lake of the black bull) it is just south of the Argentine town of Esquel in the province of Chubut (43°16’ S, 71°20’ W).
Set on the edge of the steppe its shores are surrounded by ñire forests and with the mighty Andes are its backstage. See it in the lower central part of the map above.
It is quite shallow (55 m – 187 ft.) and small (14.5 km2 – 5.6 sq. mi.); it flows into the Pacific Ocean through Chile through the Futaleufú river.
The local natives tell an ancient tale about a fierce black bull that lived by the lake that killed the son of an Indian chief who had tried to hunt it. The grieving chief in turn killed the bull, which, even dead, can often be heard howling and “seen swimming in the lake”.
The lake is also said to have a Cuero (see our post on Cuero)and a mermaid “sirena” - (see our post on Mermaids).
 Fernández, C., (1995). Cuentan Los Mapuches. B. Aires: Ediciones Nuevo Siglo. pp. 70.
For a lovely photograph of Lake Rosario, go Here.
Map adapted from: Nuevo Atlas de la Argentina © Cases i Associats S.A. 1995. Published by Clarin. Edición especial para la Secretaría de Turismo de la Nación 1996. ISBN 987 9153 00 6.
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