 From Holland it seems likely to have continued northward to the Grand River, but as that region is extensively covered with sand blown from the modern shore the beach is largely concealed.In Springport, Goldthwait's levels show the beach to be about above Lake Michigan.From the Grand River it appears to run northwestward, passing just east of Little Black Lake on the line of Muskegon and Ottawa counties and coming to the shore of Lake Michigan directly west of the north end of the lake.