Lake Minnetonka is a lake in the State of Minnesota where the 2014 U.S. Masters Swimming 9+ Mile Open Water Swimming Championship (10 mile marathon swim) will be held on 26 July 2014, organized by Genesis Aquatics and Hopkins Aquatics.
Lake Minnetonka is located west-southwest of the Twin Cities of Minneapolis–Saint Paul. The lake is irregularly shaped with numerous bays, peninsulas, and islands that form approximately 125 miles (200 km) of shoreline. The lake is located almost entirely within Hennepin County; however, its southernmost extension, Smithtown Bay, reaches into the City of Victoria, which lies within northeastern Carver County. Lake Minnetonka is divided into two separate sections, the Upper Lake and Lower Lake (which refer to the flow of water from west to east, not geographical location).