Sifton Pass, 1012 m (3320 ft), is a mountain pass

Mountain pass

A mountain pass is a route through a mountain range or over a ridge. If following the lowest possible route, a pass is locally the highest point on that route...

 in the Rocky Mountain Trench

Rocky Mountain Trench

The Rocky Mountain Trench, or the Trench or The Valley of a Thousand Peaks, is a large valley in the northern part of the Rocky Mountains. It is both visually and cartographically a striking physiographic feature extending approximately from Flathead Lake, Montana, to the Liard River, just south...

 in the Northern Interior of British Columbia

British Columbia Interior

The British Columbia Interior or BC Interior or Interior of British Columbia, usually referred to only as the Interior, is one of the three main regions of the Canadian province of British Columbia, the other two being the Lower Mainland, which comprises the overlapping areas of Greater Vancouver...

, 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...

, forming the divide between the Fox and Kechika River

Kechika River

The Kechika River also historically known as Black's River, is a tributary of the Liard River, located in northern British Columbia, Canada. The river rises at the Sifton Pass and flows northwest and then east 230 kilometres to join with the Liard River near Fireside, British Columbia...

s, and therefore between the drainage basins of the Finlay

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...

 (the north fork of the Peace

Peace River (Canada)

The Peace River is a river in Canada that originates in the Rocky Mountains of northern British Columbia and flows to the northeast through northern Alberta. The Peace River flows into the Slave River, a tributary of the Mackenzie River. The Mackenzie is the 12th longest river in the world,...

) and Liard River

Liard River

The Liard River flows through Yukon, British Columbia and the Northwest Territories, Canada. Rising in the Saint Cyr Range of the Pelly Mountains in southeastern Yukon, it flows southeast through British Columbia, marking the northern end of the Rocky Mountains and then curving northeast back...

s. It also forms a division point between the Muskwa Ranges

Muskwa Ranges

The Muskwa Ranges are a group of mountain ranges in northern British Columbia, Canada. They are part of the Northern Rockies section of the Rocky Mountains and are bounded on their west by the Rocky Mountain Trench and on their east by the Rocky Mountain Foothills...

 of the Northern Rockies to its east, and 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...

 to its west.

It forms the prominence col

Topographic prominence

In topography, prominence, also known as autonomous height, relative height, shoulder drop , or prime factor , categorizes the height of the mountain's or hill's summit by the elevation between it and the lowest contour line encircling it and no higher summit...

 for Thudaka Peak

Thudaka Peak

Thudaka Peak is the highest mountain of the Thudaka Range of the Cassiar Mountains in the Northern Interior of British Columbia, Canada, located between the heads of Obo River and Frog River. Glaciers exist on Thudaka's northern flanks, but the zone is usually quite dry.-References:* in the...

, many miles distant and the main height of land in 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...

 between the Trench and the Boundary Ranges

Boundary Ranges

The Boundary Ranges, also known in the singular and as the Alaska Boundary Range, are the largest and most northerly subrange of the Coast Mountains...

 of the Coast Mountains

Coast Mountains

The Coast Mountains are a major mountain range, in the Pacific Coast Ranges, of western North America, extending from southwestern Yukon through the Alaska Panhandle and virtually all of the Coast of British Columbia. They are so-named because of their proximity to the sea coast, and are often...

. The resulting prominence for Thudaka is 1763 m, with the line parent

Line parent

A peak's line parent is the closest higher peak on the highest ridge leading away from the peak's "key col". A col is the lowest point on the ridge between two summits and is synonymous with pass, gap, saddle and notch. A peak's "key col" is the lowest point on the ridge which connects the peak...

 for that peak being Mount Lloyd George, one of the highest in the Muskwa Ranges.