Lac du Bourget (; English Lake Bourget), also locally known as Lac Gris (; ) or Lac d'Aix (), is a

lake A lake is often a naturally occurring, relatively large and fixed body of water on or near the Earth's surface. It is localized in a basin or interconnected basins surrounded by dry land. Lakes lie completely on land and are separate from ...

at the southernmost end of the

Jura Mountains The Jura Mountains ( ) are a sub-alpine mountain range a short distance north of the Western Alps and mainly demarcate a long part of the French–Swiss border. While the Jura range proper (" folded Jura", ) is located in France and Switzerla ...

in the department of

Savoie Savoie (; Arpitan: ''Savouè'' or ''Savouè-d'Avâl''; English: ''Savoy'' ) is a department in the Auvergne-Rhône-Alpes region, Southeastern France. Located in the French Alps, its prefecture is Chambéry. In 2019, Savoie had a population o ...

France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...

. It is the deepest lake located entirely within France, and either the largest or second largest after Lac de Grand-Lieu depending on season. The largest town on its shore is

Aix-les-Bains Aix-les-Bains (, ; ; ), known locally and simply as Aix, is a Communes of France, commune in the southeastern French Departments of France, department of Savoie.Chambéry Chambéry (, , ; Franco-Provençal, Arpitan: ''Chambèri'') is the Prefectures in France, prefecture and List of communes in France with over 20,000 inhabitants, largest city of the Savoie Departments of France, department in the southeastern ...

, the capital of Savoie, lies about 10 km south of the lake. The lake is mainly fed by the river Leysse (and other small rivers), and it drains towards the river

Rhône The Rhône ( , ; Occitan language, Occitan: ''Ròse''; Franco-Provençal, Arpitan: ''Rôno'') is a major river in France and Switzerland, rising in the Alps and flowing west and south through Lake Geneva and Southeastern France before dischargi ...

through the Canal de Savières, an artificial channel. It is a

Ramsar site A Ramsar site is a wetland site designated to be of international importance under the Ramsar Convention,8 ha (O) *** Permanent 8 ha (P) *** Seasonal Intermittent < 8 ha(Ts) **

bezoule was found only in this lake. The lake was formed during the last period of global glaciation in the Alps (Würm glaciation) during the

Pleistocene The Pleistocene ( ; referred to colloquially as the ''ice age, Ice Age'') is the geological epoch (geology), epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fin ...

epoch. It has a surface area of . The long and narrow north-south axis of the lake extends 18 km in length, and ranges between 1.6 km and 3.5 km in width. The lake's average depth is 85 m, and its maximum depth in 145 m. The lake is

meromictic A meromictic lake is a lake which has layers of water that do not intermix. In ordinary, holomictic lakes, at least once each year, there is a physical mixing of the surface and the deep waters. The term ''meromictic'' was coined by the Austria ...

. Unlike ordinary lakes, its deep water does not mix annually with water closer to the surface. The lake is bordered by the steep summits of the Mont du Chat and the Chaîne de l'Épine on the west, and Bauges Mountains on the east, which form its shores. Lac du Bourget was made famous by several romantic poems of Alphonse de Lamartine, including ''Le Lac'', as well as by descriptions by

Xavier de Maistre Xavier de Maistre (; 10 October 1763 – 12 June 1852) of Savoy (then part of the Kingdom of Piedmont-Sardinia) was a French military man and author. The younger brother of Joseph de Maistre, a noted philosopher and counter-revolutionary, X ...

Honoré de Balzac Honoré de Balzac ( , more commonly ; ; born Honoré Balzac; 20 May 1799 – 18 August 1850) was a French novelist and playwright. The novel sequence ''La Comédie humaine'', which presents a panorama of post-Napoleonic French life, is ...

, and

Alexandre Dumas Alexandre Dumas (born Alexandre Dumas Davy de la Pailleterie, 24 July 1802 – 5 December 1870), also known as Alexandre Dumas , was a French novelist and playwright. His works have been translated into many languages and he is one of the mos ...

Origin of the name

Named Lacus de Burgeto in 1313, its name "Le Bourget" comes from the eponymous castle, which became the main residence of the Counts of Savoy from the middle of the 13th century until the following century. Formerly, it was called "Lac de Châtillon" (Ripa laci de Castellione in the 13th century), in reference to the castle and the eponymous seigneury. It is mentioned in particular in the donation made by the Count of Savoy Amédée III in 1125, for the foundation of the abbey of Hautecombe, "on the shore of the lake of Châtillon" (supra ripam loci de Castellione).

Climate

Lake Bourget features an

oceanic climate An oceanic climate, also known as a marine climate or maritime climate, is the temperate climate sub-type in Köppen climate classification, Köppen classification represented as ''Cfb'', typical of west coasts in higher middle latitudes of co ...

(

Köppen Köppen is a German surname. Notable people with the surname include: * Bernd Köppen (1951–2014), German pianist and composer * Carl Köppen (1833-1907), German military advisor in Meiji era Japan * Edlef Köppen (1893–1939), German author ...

: ''Cfb''), like most places in

Western Europe Western Europe is the western region of Europe. The region's extent varies depending on context. The concept of "the West" appeared in Europe in juxtaposition to "the East" and originally applied to the Western half of the ancient Mediterranean ...

. In spite of this, it is highly influenced by its interior position within France near several mountain ranges, resulting in quite hot summers and cool to cold winters with frequent temperatures below freezing, especially at night. The surrounding mountains such as mont du Chat or mont Revard have a

warm-summer humid continental climate A humid continental climate is a climatic region defined by Russo-German climatologist Wladimir Köppen in 1900, typified by four distinct seasons and large seasonal temperature differences, with warm to hot (and often humid) summers, and cold ...

(

: ''Dfb''). Convective rainfall is frequent for much of the year, rendering high precipitation/day quotas. The nearest weather station is located at Chambéry Airport, less than a mile south of the lake.

References

External links

Lake of Bourget photos Tip2trip.com

{{DEFAULTSORT:Lac Du Bourget Bourget Bourget Ramsar sites in Metropolitan France Aix-les-Bains