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Magog & Lake Memphremagog - A beautiful region to discover!

Lake Memphremagog

Memphremagog (mem-fre-ma-gog) is of Native American origin. The Abenaki tribe called it “Mam-low-baug-og”, meaning “great pond place”, while the Algonquins referred to it as “Momhrah-gog”, meaning “large expanse of waters” or “beautiful waters”. The lake straddles the border of Vermont, US and Quebec, Canada and was made by the ancient glaciers. Lake Memphremagog is a long but narrow lake, about 40 km (32 miles) in length and 1 to 3 km in width. Located 130 km to the east of Montreal, Quebec. The maximum depth of the lake Memphremagog is 107 meters (351 feet) that is as high as a 30 floor building! It also has a surface area of 102 km2 (39 sq mi) with 20 islands.



The lake supplies drinking water to numerous municipalities. It is sought-after by nautical sports amateurs and fishermen. It’s history, beauty, and attractions make it a precious jewel for our region. It’s protection and survival depend on all of us.

It is a transboundary lake, receiving 71% of its stream inflow from Vermont, USA, portion of its catchment, but with 75% of the lake surface area in Quebec. It is a lake of exceptional, rugged beauty; set in a diverse landscape, hilly and mountainous to the west, but with pastoral, rolling farmland to the east. The drainage basin of Lake Memphremagog is situated in the physiographic region of the Piedmont.

It’s early geologic history is tied to the uplift and folding of the Appalachian Mountain chain. The present lake basin was formed about 11,000 BP by glacial gouging of a pre-existing valley during the final retreat of the Wisconsin glaciation. Following the termination of the Champlain Sea phase, the present lake was formed about 9,500 BP.

The lake has three distinct basins, a deep Central, a shallower North and a South basins. 70% of the lake’s watershed is drained by three rivers which enter the lake at the extreme south end and provide the primary input of nutrients into the lake. This has resulted in a distinct nutrient gradient within the lake: the southern end is mesotrophic, while the Central and North basins remain oligotrophic.


  • 2017/03/04 10:59 Patrick Corcoran said,

    once acquiring a GPS for my tour boats it was simple to chart the lake and it’s actual length, so from the East Side restaurant in Newport to the Charest Island at the mouth of the river here in Magog it was actually 24.2 m. = 38.72 Klms. I have found a depth of 355′ off of Long Island so far that’s the deepest I’ve found.

  • 2016/08/20 22:38 Len said,

    Hi.. Does anyone remember a brown “UFO” like structure in the area in the 70-80s? I would love to hear from anyone who has any information on this structure.. thanks.. Len (len@osint.ca)

  • 2014/07/21 19:21 David Waye said,

    A Beautiful part of Quebec. I know the area very well. I have been going to Lac Aylmer for 50 years. Will be there again in 2 weeks.
    So Sorry for the troubles of all the people at Lac Megantic. Will be paying my respects when I drive through..

  • 2014/05/09 16:46 Susan Holt said,

    This is my hometown..along with my father Theodore Holt.I reflect back looking at these photos with fond memorys.A must see for all Canadains

  • 2010/10/15 13:25 Richard McKenney said,

    The Lake is incredibly beautiful.

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