Ontario's Brook Trout fishing is the best in the world including being home to the World Record Brook Trout caught by Dr. Cook in 1915. We have famous Brook Trout rivers such as the Nipigon River, the Albany River, Dusey River and the Ogoki River to name a few that eventually run into James Bay or Hudson's Bay and are producing world class Brook Trout. There are many Ontario lakes with fantastic Brook Trout fishing. All the lakes surrounding Lake Nipigon as well as lakes in Algonquin Park and the Halliburton Highlands have great Brook Trout fishing. There are also hundreds of streams and spring-fed lakes north of Jellicoe, Armstrong and Nakina that have the best Brook Trout fishing in Ontario.
The scientific name for Brook Trout is Salvelinus Fontinalis. Most people in Ontario call them Speckled Trout. Brookies are the most beautiful fish in the world and the best tasting of the Char Family. Most have a dark red meat with a flavor that is like no other fish on earth. The best way to cook them is to roll them in flour and fry in butter. The skin is the tastiest part. A 3-pound Brookie is considered a trophy by many. There are a few Ontario outfitters listed in this site that can hook you up with 5 and 6-pound fish. On occasion 7 and 8-pounders get caught but a Brookies that big is super rare anywhere in Ontario .
Brookies prefer a water temperature of 53 degrees or cooler. With this in mind the Brookies actively migrate to sections of a river with cold springs during the summer and then in the fall move back to the spots where they stay the rest of the year. In lakes the Brookies will go deep to find cooler water in the summer. It's rare for them to go deeper than 35 feet so if a lake's water is not cold at 35 feet deep then most likely it's not a good lake to be fishing. Brook Trout do have a higher tolerance to warm water than most so in the middle of the summer right at dusk they will shoot up to the surface to hit flies and other insects. They don't stay shallow long in the summer.
Brook Trout Distribution in Ontario
Brook Trout are mainly found from the eastern border of Manitoba through Ontario, Quebec and onto the east coast of Canada with the greatest eastern populations being in Newfoundland and New Brunswick. Brook Trout are actually a species of Char and in prehistoric times evolved to be exclusively a sea-run trout. They lived in the Arctic Ocean and North Atlantic Ocean and only traveled into fresh water streams and rivers to spawn. Over a millennium the Brook Trout became distributed from central Saskatchewan through Manitoba and into Ontario and evolved to live permanently in fresh water lakes and streams.
During the last ice age a giant wall of ice stretched right around the border of Hudson's Bay and James Bay. This wall of ice prohibited the arctic watershed from draining water and it formed an enormous lake called Lake Agassiz. This lake eventually covered many of the small lakes and streams and the Brook Trout were free to swim around in Lake Agassiz. Near the end of the last ice age this wall of ice eventually broke with trillions of tons of water per second flowing into Hudson's Bay and the Brook Trout were swept away with the water. This basically wiped out the major Brook Trout populations in Saskatchewan and Manitoba.
To this day, the previous location of Lake Agassiz is where Brook Trout are at their lowest concentrations as shown on the maps below. There are a few scattered Brook Trout lakes that have been stocked in Northwestern Ontario and Manitoba but your best Brook Trout fishing opportunities are found North of Lake Superior all the way north to tributaries that flow into James Bay and Hudson's Bay, around Lake Nipigon and east of Lake Huron in the Algonquin Park Highlands and the Halliburton Highlands. There is Brook Trout fishing in Southern Ontario but they are mainly tiny spring-fed streams that only produce tiny Brook Trout. If fishing for a trophy is your goal then you have to head north.