Seneca Lake Marina is a truly unique and convenient place to enjoy one of Ohio’s most beautiful lakes. Seneca Lake is the largest of the Muskingum Watershed Conservatory lakes at 3,550 acres and horsepower limit of 399. Our knowledgeable Marina staff is driven to make your boating experience memorable. Seneca Lake Marina offers the following services: Pontoon and fishing boat rentals, bait and tackle, boating, camping supplies and gifts, seasonal and transient docking, 90 octane ethanol-free recreational gas, public launch ramp, boat repair and storage. There is also courtesy boat docking (up to 2 hours) and The Dockside Restaurant where you can eat inside or on the outdoor deck with a great view of the lake.