Tunnel Bay Marina is located in beautiful downtown Brockville, Ontario. The Brockville Arts Center, restaurants, shopping and other attractions are all nearby. Our services are ready to help you enjoy the finest of boating experiences in the beautiful Thousand Islands. Tunnel Bay Marina offers 110 slips for boats up to sixty feet. Our docks are private and offer a friendly boating community. All docks are conveniently accessed from marina parking and downtown Brockville is only steps away. WIFI Internet access can be purchased through the marina office and is available on all docks.