Welcome to Irwin Marine New Hampshire's leader in new and used boats sales. An authorized dealer for Sea Ray, Princecraft, Sea Doo, Ski Doo, Can AM ATVs and Old Town Canoes and Kayaks. Established in 1919 we are a full service marina offering boat slips, valet, storage, service and parts. With three locations to serve you in Laconia, Alton and Hudson NH. Sign-up to receive our e-newsletter for deals, news and more!