Based on their location, NE of Minneapolis, I would guess Lake Nokomis. This looks to be the closest lake and is where Midwest Mountaineering used to have test paddles. According to Google their storefront is a bit north of the old Midwest Mountaineering, on the other side of the river.
Sounds like it's more than just an outlet for Hornbeck boats:
Hornbeck Boats branches out to the Land of 10,000 Lakes
Adirondack boat builder Hornbeck Boats expands to Minneapolis with new retail store opening this month.
www.adirondackexplorer.org
Alan
