Located right on our main dock, Harbor One Marina offers both gasoline and diesel for your convenience. Conveniently located from Long Island Sound, we are the first fuel dock on the Connecticut River. Our fuel tanks were newly installed in 2025 and are filled with clean, high-quality fuel. Top off today and enjoy the confidence that your boat is running at its best.

Additionally, the dock house serves as a hub for SEA TOW, providing essential boating supplies and acting as a central base for their operations.