South Summit Lake is about long and wide, and lies at an elevation of . The primary inflow is over the Summit Control Dam from
Mojikit Lake, water backed up into the lake from the Ogoki Reservoir on the
Ogoki River, part of the
Albany River system in the
James Bay drainage basin. The diverted water flows into the north end of South Summit Lake, and out at the south end over the Stork Falls to Stork Lake. The water continues south through a series of lakes and the Little Jackfish River to Lake Nipigon, then via the
Nipigon River into
Lake Superior. ==Notes==