The East Branch Moose River is a short tributary of the South Branch Moose River in (Maine Township 1, Range 7, WBKP), Maine. From its source (45°26′15″N 70°30′41″W / 45.4376°N 70.5115°W) on Kibby Mountain, the river runs 3.1 miles (5.0 km) northwest to its confluence with the Moose River's South Branch.