Lac de Calacuccia is a reservoir in the Haute-Corse department of France formed by damming the Golo river.

The climate differs from the rest of Corsica due to its position in the center of the island and the surrounding high peaks.

[6] Fauna include Geoffroy's bat (Myotis emarginatus), carrion crow (Corvus corone cornix), brown trout (Salmo trutta) and great green bush-cricket (Tettigonia viridissima).

[7] In August 1964 five hundred people led by all the elected representatives of the canton of Corte demonstrated against construction of the dam.

They proclaimed "their fierce determination to oppose by all means in their power to the realization of this project, which, in its current conception, would lead to the ruin of the valley of their ancestors and cradle of their children".

However, in January 1964 the departmental assembly had voted 52 to 5 in favour of the concessions requested by Électricité de France and the semi-public Société d'aménagement pour la mise en valeur de la Corse (Somivac) for the agricultural development of Corsica.