2010 Map of Boulder Lake Reservoir

About this map

Boulder Lake Reservoir and Island Lake Reservoir dominate this landscape north of Duluth, illustrating the extensive hydrological management of the Cloquet River watershed. The placement of the Boulder Lake Dam regulates the flow through a series of interconnected basins and smaller water bodies like Nevens Lake and the Twin Lakes. This complex system of reservoirs is a hallmark of the region's utilities and recreation, supporting unique facilities such as the North Country Seaplane Base on the northern reaches of Island Lake. The road network, including Breezy Point Rd and Tomahawk Point Rd, highlights a shift toward seasonal residency and recreational access around the shoreline. Along the northern edge, the Us-Kab-Wan-Ka River and Boulder Creek feed into this managed system, while local routes like Three Lakes Rd provide access to the quieter, smaller lakes including Apple Lake.