Lake Magog is a

freshwater lake A lake is an area filled with water, localized in a basin, surrounded by land, and distinct from any river or other outlet that serves to feed or drain the lake. Lakes lie on land and are not part of the ocean, although, like the much larger ...

located in the

Estrie Estrie () is an administrative region of Quebec that comprises the Eastern Townships. ''Estrie'', a French neologism, was coined as a derivative of ''est'', "east". Originally settled by anglophones, today it is about 90 per cent francophone. Angl ...

region of

Quebec Quebec ( ; )According to the Canadian government, ''Québec'' (with the acute accent) is the official name in Canadian French and ''Quebec'' (without the accent) is the province's official name in Canadian English is one of the thirtee ...

, Canada. It is bordered by three municipalities:

Sherbrooke Sherbrooke ( ; ) is a city in southern Quebec, Canada. It is at the confluence of the Saint-François and Magog rivers in the heart of the Estrie administrative region. Sherbrooke is also the name of a territory equivalent to a regional count ...

, Magog and

Sainte-Catherine-de-Hatley Sainte-Catherine-de-Hatley is a municipality in the Memphrémagog Regional County Municipality in the Eastern Townships region of Quebec, Canada. Located along Quebec Route 108 on Little Lake Magog, it is the home of the "Marais" birdwatching s ...

. Located in the Appalachian geological province, Lake Magog consists of

sedimentary rock Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at Earth's surface, followed by cementation. Sedimentation is the collective name for processes that cause these particles ...

, especially

slate Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism. It is the finest grained foliated metamorphic rock. ...

and

sandstone Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates) ...

. Lake Magog is part of the watershed of the St. Francois River, which flows into the

St. Lawrence River The St. Lawrence River (french: Fleuve Saint-Laurent, ) is a large river in the middle latitudes of North America. Its headwaters begin flowing from Lake Ontario in a (roughly) northeasterly direction, into the Gulf of St. Lawrence, connecting ...

Hydrology

The drainage area of the

Magog River The Magog River, or Sekosonotek in Abenaki, is a river that drains Lake Memphremagog. It is a small river running through the territories of the cities of Magog and Sherbrooke, in the administrative region of Estrie, in Quebec, in Canada, along a ...

's watershed is . Lake Magog's the maximum length and width are and , respectively. Its area is . The maximum depth is and its and average depth is . Lake Magog's water is supplied mainly by the Magog River which flows from

Lake Memphremagog Lake Memphremagog (; french: Lac Memphrémagog) is a fresh water glacial lake located between Newport, Vermont, United States and Magog, Quebec, Canada. The lake spans both Quebec and Vermont, but is mostly in Quebec. Most of the watershed that ...

. There are a couple of streams of different sizes that feed the river and Lake Magog. Four

hydroelectric dam Hydroelectricity, or hydroelectric power, is electricity generated from hydropower (water power). Hydropower supplies one sixth of the world's electricity, almost 4500 TWh in 2020, which is more than all other renewable sources combined an ...

s were built near Lake Magog. Their role is to generate

electricity Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described ...

and control the level of water. Magog Lake is a

reservoir A reservoir (; from French ''réservoir'' ) is an enlarged lake behind a dam. Such a dam may be either artificial, built to store fresh water or it may be a natural formation. Reservoirs can be created in a number of ways, including contro ...

resulting from these dams, the most influential being that of Rock Forest built in 1911.Centrale Rock Forest - Ville de Sherbrooke
These dams alter the rate of renewal of the lake by changing the flow of the Magog River. Lake Magog contains eight

island An island (or isle) is an isolated piece of habitat that is surrounded by a dramatically different habitat, such as water. Very small islands such as emergent land features on atolls can be called islets, skerries, cays or keys. An island ...

s (all private), including two

islet An islet is a very small, often unnamed island. Most definitions are not precise, but some suggest that an islet has little or no vegetation and cannot support human habitation. It may be made of rock, sand and/or hard coral; may be permanent ...

s, as well as two

shoal In oceanography, geomorphology, and geoscience, a shoal is a natural submerged ridge, bank, or bar that consists of, or is covered by, sand or other unconsolidated material and rises from the bed of a body of water to near the surface. It ...

s which have been small islands in the past. Two islands are constructed: the island of the nautical club, and the largest island of the Marinier Archipelago (also known as Odanak Islands). At the southern end of the lake, a marsh is accessible to hikers.Île du Marais - Accueil
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References

External links

Association pour la préservation du lac Magog

Regroupement pour la préservation de l'île et du marais de Katevale (L'île du marais)
Magog Landforms of Sherbrooke Tributaries of the Saint Lawrence River Tourist attractions in Estrie {{Estrie-geo-stub