Lake Yanahuani

Infobox lake
lake_name = Lake Yanahuani
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location = Pasco Region
coords = coord|11|07|S|76|32|W|region:PE-PAS_type:waterbody_source:dewiki|display=inline,title
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basin_countries = Peru
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elevation = 4,900 m
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Lake Yanahuin (or: Yanahuni, Yanahuani) is situated in the central Peruvian Andes in the Pasco Region at an altitude of ca. 4,900 m.

The site made world headlines in 1971 when on March 18 a rock avalanche of 100,000 m³ fell from an outcrop of jointed limestone ca. 400 m above the lake, causing a wave of 30 m that destroyed the mining camp of Chungar on the shore and killed 200-600 miners.