Siffleur Mountain is a mountain summit located in the North Saskatchewan River valley of Alberta, Canada. Siffleur Mountain is situated in the Siffleur Wilderness Area of the Canadian Rockies. Its nearest higher peak is Mount Loudon, to the southwest. The mountain can be seen from Highway 11, the David Thompson Highway. Precipitation runoff from Siffleur Mountain flows north via Loudon Creek and Siffleur River.