This region is the largest one of them all! It covers Labrador, most of Quebec and Ontario, much of northern Manitoba and Saskatchewan, a tiny part of north east Alberta, and part of the Northwest Territories!
This region has many bogs called muskeg.
* muskeg - is a swamp or bog formed from the buildup of moss, leaves and other plants.
There are also many rich mineral deposits of nickel, gold, silver and copper.
This region has a harsh climate and gets very cold in the winter. There used to be mountains in this region, that eroded away over millions of years - leaving rock very close to the surface. Due to this there is very little soil for things like farming.
The Hudson's Bay Company was created in 1670, and was a British fur trading company. Two French coureur des bois (see their section of this website), were mad at France for not listening to their idea about travelling further north near Hudson's Bay to set up a trading post.
So, being mad at France, they approached Britain - who listened to them! They then started to send boats through the Hudson's Bay to the ocean, loaded with furs to send back to England, and the Hudson's Bay Company began.