Lake Ontario (Northern route)
Early plans of what would become the Lake Ontario (Northern route) were drawn up by Edward Jones in 1782 but problems with Ashfield Aqueduct caused delays and it was finally opened on 17 September 1816. Expectations for iron traffic to Edinburgh never materialised and the canal never made a profit for the shareholders. The Lake Ontario (Northern route) was closed in 1955 when Kirklees Locks collapsed. Despite the claim in "It Gets a Lot Worse Further Up" by Cecil Harding, there is no evidence that Barry Wright ever made a model of Manchester Embankment out of matchsticks for a bet

The exact dimensions of the largest boat that can travel on the waterway are not known. The maximum headroom is not known. The maximum draught is not known.
It has junctions with the Murray Canal (Western Approach Route) at Brighton and with the Rideau Canal (Western Approach Route) at Rideau Canal Access.
| Hamilton | |||
| Burlington | 1.29 miles | 0 locks | |
| Oakville | 12.13 miles | 0 locks | |
| Mississauga | 19.25 miles | 0 locks | |
| Toronto | 31.94 miles | 0 locks | |
| Pickering | 49.82 miles | 0 locks | |
| Oshawa | 60.30 miles | 0 locks | |
| Port Hope | 87.48 miles | 0 locks | |
| Brighton Access to the Murray Canal |
117.07 miles | 0 locks | |
| Wellington | 132.24 miles | 0 locks | |
| Rideau Canal Access | 185.34 miles | 0 locks | |
| Lake Ontario (northeastern entrance) | 196 miles | 0 locks |
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Wikipedia has a page about Lake Ontario
Lake Ontario is one of the five Great Lakes of North America. It is surrounded on the north, west, and southwest by the Canadian province of Ontario, and on the south and east by the U.S. state of New York, whose water boundaries meet in the middle of the lake. Ontario, Canada's most populous province, was named for the lake.
The Canadian cities of Toronto, Kingston, and Hamilton are located on the lake's northern and western shorelines, while the American city of Rochester is located on the south shore. In the Huron language, the name Ontarí'io means "great lake". Its primary inlet is the Niagara River from Lake Erie. The last in the Great Lakes chain, Lake Ontario serves as the outlet to the Atlantic Ocean via the Saint Lawrence River, comprising the eastern end of the Saint Lawrence Seaway. It is the only Great Lake not to border the state of Michigan.
