Deepest reservoirs in France

As of 2026-08-21, Lac de Cap-de-Long tops the list with 130 m.

1. #1 Lac de Cap-de-Long — 130 m

   lake in France

   Lac de Cap-de-Long is a lake in Hautes-Pyrénées, France. At an elevation of 2161 m, its surface area is 1.1 km². Read more on Wikipedia.

   Wikidata
2. #2 Lac Bleu de Lesponne — 121 m

   lake in Hautes-Pyrénées, France

   Lac Bleu de Lesponne is a lake in Hautes-Pyrénées, France. At an elevation of 1977 m, its surface area is 0.51 km². Read more on Wikipedia.

   Wikidata
3. #3 Lac de Monteynard-Avignonet — 115 m

   reservoir in France

   The Lac de Monteynard-Avignonet is an artificial water reservoir for the Électricité de France (EDF) power station on the river Drac. It belongs to the department of Isère. It is bounded by the canyons of the Drac and Ebron. Read more on Wikipedia.

   Wikidata
4. #4 Sautet Lake — 115 m

   reservoir in France

   source Wikidata
5. #5 Lac de Bort-les-Orgues — 110 m

   reservoir in France

   Lac de Bort-les-Orgues is a lake located on the border of the Cantal, Corrèze and Puy-de-Dôme departments, France. At an elevation of 437 m, its surface area is 10.72 km2. Read more on Wikipedia.

   Wikidata
6. #6 Lac du Portillon — 101 m

   lake in the Pyrénées

   Lac du Portillon is a lake in Pyrénées, Haute-Garonne, France. At an elevation of 2580 m, its surface area is 0.34 km². Read more on Wikipedia.

   Wikidata
7. #7 Lac de Castillon — 100 m

   lake in France

   The Lac de Castillon (English: Lake of Castillon) is a reservoir in the Alpes-de-Haute-Provence department, Southeastern France. At an elevation of 880 m (2,890 ft), the lake's surface area is 5 km2 (1.9 sq mi). The Castillon dam holds 150,000,000 m3 (5.3×109 cu ft) of water. Read more on Wikipedia.

   Wikidata
8. #8 Lac de Gnioure — 100 m

   body of water

   Lac de Gnioure is a lake in Ariège, France. At an elevation of 1831.5 m, its surface area is 0.86 km2. Construction of the dam began in 1939 and was completed in 1950. The lake is 2.6 miles from the Andorran border. Read more on Wikipedia.

   Wikidata
9. #9 Lac de Vouglans — 100 m

   reservoir

   The Lac de Vouglans is the reservoir of the hydro-electric power station at Vouglans on the river Ain in the département of Jura in the region of Bourgogne-Franche-Comté in eastern France. The dam, the Barrage de Vouglans is at coordinates 46°23′51″N 5°39′56″E. Read more on Wikipedia.

   Wikidata
10. #10 Lake of Sainte-Croix — 93 m

    artificial lake in southern France

    The Lake of Sainte-Croix is a reservoir in Southern France that was formed by the construction, between 1971 and 1974, of a reinforced-concrete arch dam, the Sainte-Croix Dam. It marks the departmental border between Var to the southeast and Alpes-de-Haute-Provence to the northwest. Read more on Wikipedia.

    Wikidata