Sunday Lake (in French: lac Sunday) is a lake located in the municipality of Saints-Martyrs-Canadiens, in the Arthabaska Regional County Municipality, in the administrative region du Centre-du-Québec, in Québec, in Canada.Commission de toponymie du Québec. It is headlake of the rivière au Pin, about upstream from Breeches Lake.
Geography The lake, long and wide, is private and the Brothers of the Sacred Heart own it; the banks are almost entirely wooded. Camp Beauséjour is a welcoming place for groups and families. Recreational trips, a family camp, and fishing are available.
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