The Tatlatui Range is a large and very alpine mountain range

Mountain range

A mountain range is a single, large mass consisting of a succession of mountains or narrowly spaced mountain ridges, with or without peaks, closely related in position, direction, formation, and age; a component part of a mountain system or of a mountain chain...

 on the east flank of the upper Skeena River

Skeena River

The Skeena River is the second longest river entirely within British Columbia, Canada . The Skeena is an important transportation artery, particularly for the Tsimshian and the Gitxsan - whose names mean "inside the Skeena River" and "people of the Skeena River" respectively, and also during the...

 in northern British Columbia

British Columbia

British Columbia is the westernmost of Canada's provinces and is known for its natural beauty, as reflected in its Latin motto, Splendor sine occasu . Its name was chosen by Queen Victoria in 1858...

, Canada

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

. It has an area of 2307 km² and is a subrange of the Omineca Mountains

Omineca Mountains

The Omineca Mountains, also known as "the Ominecas", are a group of remote mountain ranges in north-central British Columbia, Canada. They are bounded by the Finlay River on the north, the Rocky Mountain Trench on the east, the Nation River on the south, and the upper reaches of the Omineca River...

 which in turn form part of the Interior Mountains

Interior Mountains

The Interior Mountains, also called the Northern Interior Mountains and Interior Ranges, are the semi-official names for a huge area that comprises much of the northern two thirds of the Canadian province of British Columbia and a large area of southern Yukon...

. The range features several lakes, the largest of which, Thutade Lake

Thutade Lake

Thutade Lake is located in the Omineca Mountains of the Northern Interior of British Columbia, Canada. About 40 km in length, and no more than about 2 km wide, the lake is primarily significant as the ultimate source of the Mackenzie River. The lake is at the head of the Finlay River,...

, is at the head of the Finlay River

Finlay River

The Finlay River is a 402 km long river in north-central British Columbia flowing north and thence south from Thutade Lake in the Omineca Mountains to Williston Lake, the impounded waters of the Peace River formed by the completion of the W.A.C. Bennett Dam in 1968. Prior to this, the Finlay...

, and is considered the ultimate source of the Mackenzie River

Mackenzie River

The Mackenzie River is the largest river system in Canada. It flows through a vast, isolated region of forest and tundra entirely within the country's Northwest Territories, although its many tributaries reach into four other Canadian provinces and territories...

. Tatlatui Lake

Tatlatui Lake

Tatlatui Lake is a lake in the Tatlatui Range of the Omineca Mountains of the Northern Interior of British Columbia, Canada. It is the source of the Firesteel River, the uppermost left tributary of the Finlay River, which begins just southeast at Thutade Lake, which is considered the ultimate...

, the next largest lake in the range, to the northwest of Thutade Lake, is at the head of the Firesteel River, a tributary of the Finlay. Various summits of the range, which as described separates the Pacific

Pacific Ocean

The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the Americas in the east.At 165.2 million square kilometres in area, this largest division of the World...

 and Arctic

Arctic Ocean

The Arctic Ocean, located in the Northern Hemisphere and mostly in the Arctic north polar region, is the smallest and shallowest of the world's five major oceanic divisions...

 drainages, form part of the Continental Divide. Most of the range and its lakes are in Tatlatui Provincial Park

Tatlatui Provincial Park

Tatlatui Provincial Park is a provincial park in British Columbia, Canada, located at the southern end of the Spatsizi Plateau and around the headwaters of the Firesteel River, part of the Finlay-Peace River basin and therefore in the Arctic drainage...

.