Area: 62926 sq km.
Location: The Cassiar Range is located in north central British Columbia and south central Yukon. The boundaries are Finlay River (south), Rocky Mountain Trench (east), Liard River (north), and Stikine Plateau (west). Holland defines the area around Mt Cushing, SE of Thudaka Pk, as belonging to the Swannell Ranges, and therefore to the Omineca Mountains, as has been charted here, but in some systems the entirety between the Finlay River and Dease might be naturally construed as the Cassiar Mountains.
Terrain: The Cassiar Mountains are mostly made up of gentle flat-topped peaks with summit elevations around 1700-1800 m. The highest peaks are located near the extreme south end of the range where there are several summits above 2400 m. Although it is difficult to generalize about weather conditions, a continental type of climate dominates most of the area.