The West Branch Little Black River (French: Ruisseau à l'Eau Claire) is a short river in Quebec and northern Maine. The river starts at the confluence (47°20′25″N69°26′30″W) of the Branche Oueste [west branch] du Ruisseau à l'Eau Claire and the Petit Ruisseau à l'Eau Claire, in Témiscouata RCM, Quebec. The river runs east and southeast, roughly along the border between Témiscouata and Kamouraska RCM, to the Canada – United States border in Maine Township 19, Range 12, WELS.