Toronto Harbour or Toronto Bay is a bay on the north shore of Lake Ontario, in Toronto, Ontario, Canada. It is a natural harbour, protected from Lake Ontario waves by the Toronto Islands. Today, the harbour is used primarily for recreational boating, including personal vessels and pleasure boats providing scenic or party cruises. Ferries travel from docks on the mainland to the Islands, and cargo ships deliver aggregates and raw sugar to industries located in the harbour. Historically, the harbour has been used for military vessels, passenger traffic and cargo traffic. Waterfront uses include residential, recreational, cultural, commercial and industrial sites.
There are two harbours: the original natural harbour, today named the "Inner Harbour", and the "Outer Harbour". Access into the Inner Harbour is made via either the Western Gap or Eastern Gap. The Don River drains into the Inner Harbour from the north-east, through the Keating Channel.
The Inner Harbour is used by pleasure boats and commercial vessels. The Ports Toronto agency maintains the harbour and operates port facilities and a passenger ship dock on the eastern shore. The north shore has a mixed range of uses including Harbourfront, a conversion from industrial land to recreational and cultural uses. Harbourfront has parks, hotels, an amphitheatre, and many other facilities. The north shore retains one port-related industrial use, the Redpath Sugar Refinery, while most of the lands have been converted to other uses. The Jack Layton Ferry Terminal is located at the foot of Bay Street and pleasure and party cruise boats dock along the shore to the west of York Street. The Toronto Islands are mostly parkland, and are the site of several boat clubs, an amusement park, an airport, and a small residential area.
The Western Gap is a 120 metres (390 ft) wide channel allowing western access to the Inner Harbour. The gap is deep enough (over 31 metres) to allow large ships (like lake freighters) to enter and exit into the Inner Harbour. The Billy Bishop Toronto City Airport is located on the south side of the channel and is accessed by ferry and tunnel. Before the island airport was built, the waterway was wide with a shallow sandy shoal surrounding what became Hanlan's Point. The channel was dredged and the sands deposited to form the airport lands.