Lac de Creno, Mountain lake in Corsica, France

Lac de Creno is a glacial lake at 1,310 metres in the Monte Rotondo massif, north of Monte Sant'Eliseo in the Orto commune. It lies in a basin above the villages of Orto, Soccia and Guagno, ringed by laricio pines and floating mats of water lilies with pink and white flowers.

Lac de Creno is a glacial lake in the Monte Rotondo massif, the lowest of Corsica's glacial lakes. Its water lilies, both red- and white-flowered, along with reeds, were introduced at the end of the 20th century and have since spread as invasive plants.

The lake lies above the villages of Orto, Soccia and Guagno in the Deux-Sorru region, and its Corsican name is Lavu à Crena. Walkers reach it only on footpaths, and in summer it is busy with hikers from Soccia.

Reaching the lake requires a one-hour hike from a parking area above Soccia village, following marked forest trails throughout. The best visiting season is June through September when the lake is ice-free and trails are most passable.

The round-leaved sundew, a rare protected carnivorous plant, grows in the pozzines around the lake, not in the water. The red and white water lilies and reeds were introduced at the end of the 20th century and tend to be invasive.