Mandan, North Dakota
Boat Dealer Serving Mandan, North Dakota
Mandan is home turf. Our Bismarck store on E Bismarck Expressway is about 15 minutes across the river — close enough to swing by after work — and Mandan boaters have the Missouri River in town, Lake Oahe’s upper ramps half an hour south, and Nelson Lake’s year-round open water 40 minutes west.
Sales, service, parts, winterization, storage: everything is a bridge away.
Where Mandan Boats
- Lake Oahe (upper end). About 30 minutes south — 231 miles of reservoir starting at your doorstep. Lake guide →
- Nelson Lake. About 40 minutes west near Center — the power-plant lake that never freezes, with the state’s best largemouth bass. Lake guide →
Why Mandan Buys From Vallely
We're a third-generation, family-owned dealer with more than 50 years in North Dakota and two full-service stores. We carry Bennington, Lund, MasterCraft, Sea Ray, Yamaha, Polaris, and more — new and used — with financing, factory-trained service, and delivery across the region, including Mandan.
Your nearest store is Vallely Sport & Marine — Bismarck — about 15 minutes across the river. Call (701) 299-0172 and we'll have it ready when you arrive, or deliver it to your door.



