The Achepabanca River is a tributary of the Mégiscane River, flowing into the north-eastern part of Senneterre, in La Vallée-de-l'Or Regional County Municipality (RCM), in the administrative region of Abitibi-Témiscamingue, in Quebec, in Canada.

The course of the river successively crosses the townships of Maricourt, Charrette and Girouard (on the border of the canton Berthelot).

The Achepabanca River runs entirely on forest land north-east of the La Vérendrye Wildlife Reserve and on the west side of Gouin Reservoir.

The surface of the river is usually frozen from the beginning of December to the end of April.

The hydrographic slope of the Achepabanca River is served by some forest roads.