The Saskatchewan, though not in the province, empties into Lake Winnipeg less than half a degree from the northern boundary.
Alba, the white oak, abounding all over the eastern districts to the continent from Lake Winnipeg and the St Lawrence countries of the shores of the Mexican Gulf.
The Red river flows in a winding channel along the eastern boundary and empties into Lake Winnipeg in Canada, thence reaching Hudson Bay through the Nelson river.
The chief rivers emptying into Lake Winnipeg are the Winnipeg, the Red and the Saskatchewan.
Of the three great continental river systems above mentioned, the Red River and its tributaries drain the western and west central slope northward through Lake Winnipeg into Hudson Bay; the other two being the St Lawrence system, to which the St Louis River and its branches and several smaller streams flowing into Lake Superior contribute their waters by way of the Great Lakes and the Mississippi, which with its tributaries drains about two-thirds of the state into the Gulf of Mexico.