1959 Map of Conners Island

About this map

The United States-Canada international boundary follows the waterway of the Granite River as it winds northward from Granite Lake toward Saganaga Lake. This 1959 survey records the intricate network of portages and rapids essential for navigating this lakeland corridor within the Superior National Forest and Minnesota State Forest. Notable features include the Gneiss Lake Portage and Blueberry Portage, which bypass turbulent stretches like Horsetail Rapids and Saganaga Falls. The landscape is dominated by glacial activity, visible in the numerous islands such as Conners Island and Oskenonton Island. While the area is largely wilderness, the presence of a Gravel Pit and Sandpit near Onagon Lake indicates localized resource extraction during this era, supporting the remote infrastructure of the Boundary Waters region.