|Location||Kenora District, Ontario|
|Primary inflows||Otoskwin River, Marten-Drinking River, Pineimuta River|
|Primary outflows||Attawapiskat River, North Channel|
|Surface area||281 square kilometres (108 sq mi)|
|Shore length1||596 kilometres (370 mi)|
|1 Shore length is not a well-defined measure.|
Attawapiskat Lake is a lake in Kenora District, Ontario, Canada. The primary inflows are the Otoskwin River, the Marten-Drinking River and the Pineimuta River. The two outflows are the Attawapiskat River and the North Channel, which itself flows into the Attawapiskat River.
The name of the lake comes from a region through which the Attawapiskat River flows less than 100 kilometres (62 mi) from its mouth, where it has carved out a several clusters of spectacular high limestone islands, nicknamed by canoeists the "Birthday Cakes". The formations are unique to the region, the Swampy Cree (Omushkegowuk) word for which, chat-a-wa-pis-shkag, gives name to the river and hence the lake.
- "Toporama - Topographic Map Sheets 43D3 43D4, 43D5, 53A1, 53A8". Atlas of Canada. Natural Resources Canada. Retrieved 2009-08-14.
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