Simpson Peak 2170 m is the northernmost officially-named summit in the Stikine Ranges

Stikine Ranges

The Stikine Ranges are a mountain range in northwestern British Columbia, Canada. They are the northernmost subdivision of the Cassiar Mountains and among the least explored and most undeveloped parts of the province.-Sub-ranges:*Beady Range...

 of the Cassiar Mountains

Cassiar Mountains

The Cassiar Mountains are the most northerly group of the Northern Interior Mountains in the Canadian province of British Columbia and the Yukon Territory. They lie north and west of the Omineca Mountains, west of the northernmost Rockies and the Rocky Mountain Trench, north of the Hazelton...

 system in northernmost 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 stands on the north side of the lower reaches of the Jennings River

Jennings River

The Jennings River is a river in far northern British Columbia, Canada, rising in the northern reaches of the Stikine Ranges of the Cassiar Mountains, at first running southwest, then turning northeast near the Tuya Range to enter Teslin Lake at its southern end, just to the east of the estuary of...

, just east of the south end of Teslin Lake

Teslin Lake

Teslin Lake is a large lake spanning the border between British Columbia and Yukon in Canada. It is one of a group of large lakes in the region of far northwestern BC, east of the upper Alaska Panhandle, which are the southern extremity of the basin of the Yukon River, and which are known in the...

, and is to the south of Swan Lake, which is an expansion of the Swift River

Swift River (Teslin)

The Swift River is a river that begins in Yukon Territory and flows southwest into British Columbia to its mouth at the east side of Teslin Lake on the Teslin River system...

. The mountain is named for Scott Simpson, an early explorer in the area. The next-highest summit in the unnamed subrange of the Cassiars to the north of the Jennings River is Toozaza Peak

Toozaza Peak

Toozaza Peak is a tuya in the Stikine Ranges of the Cassiar Mountains in northern British Columbia, Canada, located in the Iverson Creek. Toozaza Peak is the summit of a north-south aligned ridge between the head of Toozaza Creek and the head of the Jennings River, just south of the Jennings'...

 (its name is unofficial and based on that of Toozaza Creek).