The Black Duck River is a river in the provinces of Manitoba and Ontario, Canada. (Manitoba CGNDB entry) (Ontario CGNDB entry) Flowing northeast from Hosea Lake in Kenora District in Northwestern Ontario, the river criss-crosses the Manitoba-Ontario border before reaching to its mouth at Hudson Bay in the Northern Region of Manitoba just west of Manitoba's easternmost point where the inter-provincial border meets the bay. Shows the course of the river highlighted on a topographic map.

Course The river starts at Hosea Lake and ends at Hudson Bay.

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