 The lake is ideal habitat for lake trout, brook trout, and land-locked Atlantic salmon; but these species are in competition with a large population of yellow perch, and muskellunge are migrating into the lake from downstream.Saint Francis River passes through Glazier Lake on the border between Maine and New Brunswick.The river enters the north end of Glazier Lake downstream of Beau Lake and leaves the south end of Beau Lake upstream of the Saint John River confluence.