Lake Superior islands include Madeline Island in the state of Wisconsin, Michipicoten Island in the province of Ontario, and Grand Island (the location of the Grand Island National Recreation Area) in the state of Michigan. The larger cities on Lake Superior include the twin ports of Duluth, Minnesota and Superior, Wisconsin; Thunder Bay, Ontario; Marquette, Michigan; and the twin cities of Sault Ste. Marie, Michigan, and Sault Ste. Marie, Ontario. Duluth-Superior, at the western end of Lake Superior, is the most inland point on the St. Lawrence Seaway and the most inland port in the world. Among the scenic places on the
Duluth, Minnesota took first place. The Minnesota state gem, the Lake Superior agate, can be found on the shores of Lake Superior or the streams that run into it, and in gravel pits and road cuts. Duluth's Park Point is an excellent area for hunting. Shorelines and beaches are replenished each year because winter ice and storms push new material up on the shores. Books are available in Duluth to help amateur rock hounds learn more about agates, and how to locate them. Since 1977, Duluth has played host to Grandma's Marathon, held annually in June. Named after its original sponsor, Grandma's