The
Stewart River is a tributary of
Yukon River in the
Yukon Territory of
Canada. It originates in the
Selwyn Mountains, which stand on the border between the Northwest Territories and the Yukon Territory. From there, the Stewart flows west, past the village of
Mayo. The river is crossed by the
Klondike Highway at the village of Stewart Crossing, and the highway parallels the river westward for about . After leaving the highway, the river travels southwest until it intersects the Yukon River south of
Dawson City. The mostly abandoned village of
Stewart River is located at the mouth of the river.