 The Nelson River flows into Playgreen Lake from Lake Winnipeg then flows from two channels into Cross Lake.The east channel and the Jack River flow from the southeast portion of the lake into Little Playgreen Lake then the Nelson east channel continues in a northerly direction passing through Pipestone Lake on its way to Cross Lake.The Echimamish River on this section leads to the Hayes River and York Factory on the Hudson Bay part of early Canadian canoe routes important during the North American fur trade.