Lake · Argentina
Lake Viedma
Lake Viedma is a long glacier lake in Santa Cruz Province in southern Argentina. Its turquoise water comes mainly from the huge Viedma Glacier, which flows down from the mountains into the lake.



Picture credit: Liam Quinn (CC BY-SA 2.0) · Liam Quinn (CC BY-SA 2.0) · Liam Quinn (CC BY-SA 2.0) · Wikimedia Commons
Where is Lake Viedma?
Countries on its shores: Argentina.
Middle of the lake: 49.58° S, 72.50° W
The story behind it
Lake Viedma lies in a long valley that was shaped by glacier ice. It is about 80 km long but only about 15 km wide, and in places it may be around 900 metres deep. Its surface lies about 252 metres above sea level. Most of its water comes from the Viedma Glacier, which is about 5 km wide where it ends. The glacier water gives the lake its turquoise colour. From the lake, the water runs down the La Leona River into Lake Argentino and then on through the Santa Cruz River to the Atlantic Ocean. Close to the lake lies the town of El Chaltén, at the foot of the famous mountain Fitz Roy, with the peak of Cerro Torre nearby. The lake is named after the Spanish explorer Antonio de Viedma, who reached its shores in the 1780s. It is the second-largest lake that lies completely inside Argentina.
Find it on the globe
Lake Viedma is there as a small blue dot with its name, right on the water. From far away the planet is only a blue ball; detail arrives as you zoom in, and this one appears once you are close enough. Open it on the globe.
It sits at its real coordinates, not near them — the same numbers listed in the facts above. Switch off the layer for this kind of place and it disappears again; the buttons for that are down the right-hand edge.
Questions children ask
How big is Lake Viedma?
Lake Viedma covers about 1 190 km² and is about 80 km long. Sources give different figures for its area, from about 1 090 to 1 600 km².
Where does the water of Lake Viedma come from?
Most of it comes from the Viedma Glacier, a huge river of ice that flows into the lake. The glacier water gives the lake its turquoise colour.
Who was Lake Viedma named after?
It is named after the Spanish explorer Antonio de Viedma. In the 1780s he was the first European to reach its shores.
Where these numbers come from
Every figure on this page was checked against public reference sources before publication. Where sources genuinely disagree, the text says so.
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