 Another local legend is that when the Native Americans burned off the blueberry bogs next to Bete Gris after the harvest, the smoke rolling across the bay looked like a gray beast.Bete Grise beach is located off US 41, near the inland lake Lac La Belle, on the Keweenaw Peninsula of the northern Upper Peninsula of Michigan.The Bete Grise Preserve is 1500 acres of 'diverse wetland types," including shoreline stretching for 2 miles along Lake Superior.