Lawrence River to False Duck Island, ON.Ĭhart #14803 – Six Miles South of Stoney Point to Port Bay - Covers the eastern portion of Lake Ontario from south of Stoney Point, NY to Port Bay, NY.Ĭhart #14804 – Port Bay to Long Pond - Covers the southern shoreline of Lake Ontario from Port Bay, NY to Long Pond, NY.Ĭhart #14805 – Long Pond to Thirty Mile Point - Covers the southern shore of Lake Ontario from Long Pond, NY to Thirty Mile Point, NY.Ĭhart #14806 – Thirty Mile Point, NY to Port Dalhousie, ON - Covers the southern shore of Lake Ontario from Thirty Mile Point, NY to Port Dalhousie, ON.Ĭhart #14810 – Olcott to Toronto - Covers the western end of Lake Ontario from Olcott, NY to Toronto, ON.Ĭhart #14811 – Chaumont, Henderson, and Black River Bays - Provides detailed coverage of the major bays along New York State’s eastern portion of Lake Ontario.Ĭhart #14813 – Oswego Harbor - Provides detailed coverage of Oswego, NY’s harbor.Ĭhart #14814 – Sodus Bay - Provides detailed coverage of Sodus Bay, NY.Ĭhart #14815 – Rochester Harbor - Provides detailed coverage of Rochester Harbor, NY.Ĭhart #14816 – Lower Niagara River - Provides detailed coverage of the Lower Niagara River to Horseshoe Falls between NY and ON.Ĭhart #14822 – Approaches to Niagara River and Welland Canal - Provides detailed coverage of the approaches to the Niagara River and the Welland Canal.Ĭanadian Hydrographic Service Charts provide coastal coverage from the Niagara River east to the St.

Lawrence River to the Approaches to Port Weller, ON and the Welland Canal.Ĭhart #14800 – Provides limited detail for the entirety of Lake Ontario.Ĭhart #14802 – Clayton, NY to False Duck Island, ON (or south of Stony Point, NY) - Covers the eastern portion of Lake Ontario from Clayton, NY on the St. Lake Ontario has a maximum length of 193 SM (168 NM / 311 KM) and a maximum width of 53 SM (46 NM / 85 KM).

Be aware of a buoyage system reversal at Lock O8 on the Oswego Canal in Oswego, NY. Buoys and Marksīuoys, beacons, and lights on Lake Ontario make use of the standard IALA Region B lateral buoyage system (Red Right Returning). Ice sheets typically form along the shoreline and in well protected bays, where the lake waters are not deep. This being dependent on the severity of the winter. However, an ice sheet covering between 10% and 90% of the lake area typically develops. For most recreational boaters, they typically haul their vessels by mid-November and splash them again in May.īecause of its great depth, Lake Ontario never completely freezes over in winter. For commercial vessels and lock operations, the navigation season begins in late March (20th to the 31st) and runs through late December (24th to the 31st). Navigation Seasonįor all vessels the navigation season is governed by ice on the lake. Lawrence River and the Welland Canal allow for deep draft vessels while the Oswego Canal and the Trent-Severn Waterway allow access only to shallow draft vessels. Navigable access to Lake Ontario is limited to the Trent-Severn Waterway and the Welland Canal in Canada, the Oswego Canal in the USA, and the St. Lake Ontario is the only one of the Great Lakes that does not border the state of Michigan. Lawrence River is the primary outlet for all five of the Great Lakes emptying into the Atlantic Ocean. Lawrence River in the far northeastern corner of the lake. From the Niagara River, the lake water flows in a predominantly easterly direction to the mouth of the lake where it empties into the head of the St. This makes the Niagara River, located on the southwestern shore of the lake, the head of the lake. Lake Ontario is fed chiefly by the waters of Lake Erie by way of the Niagara River. The Oswego Canal connects Lake Ontario at Oswego, NY to the New York State Canal System, with outlets to the Hudson River to the east, and Lake Erie to the west. When proceeding upbound, the Niagara River and the Welland Canal is the connector to Lake Erie and the upper Great Lakes.Īdditionally, The Trent-Severn Waterway in Canada, for pleasure boats, connects Lake Ontario at the Bay of Quinte to Georgian Bay (Lake Huron), via Lake Simcoe. The Lake is connected to the Atlantic Ocean via the St. Lawrence River in the northeast to the Niagara River in the southwestern end of the lake. It is for the most part equally controlled by both Canada and the United States with the international boundary running approximately down the middle of the lake from the St. Bordered on the north, west, and southwest by Canada and on the south and east by the State of New York. Lake Ontario is the easternmost of the five Great Lakes. Sitemap Lake Ontario - Cruising & Navigation St.

Chaumont bay contour map