The Jennings River is a river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 in far 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...

, rising in the northern reaches of 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...

, at first running southwest, then turning northeast near the Tuya Range

Tuya Range

The Tuya Range is a range of tuyas, located in the Stikine Ranges of the Cassiar Mountains in the far northr of the Canadian province of British Columbia, near its border with the Yukon Territory and to the southwest of Watson Lake, Yukon, which is the nearest major settlement.-Boundaries and...

 to enter 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...

 at its southern end, just to the east of the estuary of the Teslin River

Teslin River

The Teslin River is a river in southern Yukon Territory and northwestern British Columbia, Canada, that flows 393 miles from its source south of Teslin Lake to its confluence with the Yukon River....

; also joining the lake in the same area is the Hayes River

Hayes River (British Columbia)

The Hayes River is a river in far northern British Columbia, Canada, flowing into Teslin Lake from the west, just to the west of the entry into that lake of the Teslin River. Other rivers feeding Teslin Lake include the Jennings River and the Swift River....

. The lower reaches of the Jennings form the boundary of the Nisutlin Plateau

Nisutlin Plateau

The Nisutlin Plateau is a plateau in northern British Columbia, Canada, extending from Teslin Lake to the Cassiar Mountains.-References:* in the Canadian Mountain Encyclopedia...

, which extends north into the Yukon along the eastern flank of Teslin Lake and to the west of the northernmost reaches of the Stikine Ranges; Simpson Peak

Simpson Peak (Canada)

Simpson Peak 2170 m is the northernmost officially-named summit in the Stikine Ranges of the Cassiar Mountains system in northernmost British Columbia, Canada. It stands on the north side of the lower reaches of the Jennings River, just east of the south end of Teslin Lake, and is to the south of...

 is one of the few named summits in that region of the Stikines, and stands above the lower Jennings to the east of its estuary. To the south of the Jennings, west of the Tuya Range, is the Kawdy Plateau

Kawdy Plateau

The Kawdy Plateau is a plateau in northern British Columbia, Canada, located between the Nahlin and Tuya Rivers. It includes the granitic Atsutla Range and Nazcha Hills and the volcanic Kawdy Mountain.-References:* in the Canadian Mountain Encyclopedia....

, which includes the small but rugged Atsutla Range

Atsutla Range

The Atsutla Range is a granitic mountain range on the Kawdy Plateau in northern British Columbia, Canada. The Atsutla Range lies south of the Yukon border in between Teslin Lake and the Stewart-Cassiar Highway, roughly north-northeast of Dease Lake....

, and southwest of which is the course of the Teslin River, which traverses the Kawdy, a subset of the Stikine Plateau

Stikine Plateau

The Stikine Plateau is a plateau in northern British Columbia, Canada. It lies between the Boundary Ranges of the Coast Mountains on the west and southwest and the Cassiar Mountains along its northeast, and between the Skeena Mountains on its south and southeast and the Jennings and Nakina Rivers...

, from south to north.

Ecology

Black Spruce

Black Spruce

Picea mariana is a species of spruce native to northern North America, from Newfoundland west to Alaska, and south to northern New York, Minnesota and central British Columbia...

is a major tree in the Jennings River watershed; here the species is near the western limit of its range.