Lake Sakakawea is a 368,000-acre Missouri River reservoir in north-central North Dakota — the largest reservoir in North Dakota, the third largest reservoir in the United States by surface area, and one of the premier walleye fisheries in North America. Garrison Dam on the Missouri River creates the lake, which stretches approximately 178 miles upstream from the dam through McLean, Mercer, Oliver, Dunn, McKenzie, Mountrail, and Ward counties in the vast North Dakota prairie landscape. The walleye fishery on Lake Sakakawea is the lake’s defining identity and national reputation — the Missouri River impoundment produces walleye in numbers and average size that draw dedicated walleye anglers from across the northern United States and Canada specifically targeting Sakakawea for a world-class walleye experience. Smallmouth bass, northern pike, chinook salmon, and channel catfish round out a diverse fishery across 368,000 acres of Missouri River reservoir water. The communities of Garrison, Riverdale, Minot, and Williston anchor the primary marina and boating infrastructure across the lake’s extensive North Dakota shoreline. Find Boat Services lists verified boat repair, motor service, electronics installation, trailer repair, and winterization providers serving Lake Sakakawea within 35 miles across the north-central North Dakota corridor.