The Thousand Islands region is found at the mouth of the St. Lawrence River. Leaving Lake Ontario and running along the Canadian side of the border from Kingston to Brockville, and from Cape Vincent to Morristown on the US side, the river then flows hundreds of miles to the Atlantic. The Canada/U.S. border runs down the middle of these historical and magical islands and is clearly marked on all marine charts. An area of natural wonder, it encloses a UNESCO world biosphere site.
The province of Ontario is bounded on the north by Hudson Bay and James Bay, on the east by Quebec, on the west by Manitoba, and on the south by the U.S. states of Minnesota, Michigan, Ohio, Pennsylvania and New York. Ontario's long American border is formed almost entirely by lakes and rivers. While in the area, one can visit Ottawa, Montreal, Quebec, Toronto, Niagara Falls or NYC, Boston or Washington within a few hours to a day's drive. The nearest airports are in Syracuse N.Y. (90 minutes), Ottawa, Ontario, (90 minutes), Montreal, Quebec (2 1/2 hours) or Kingston, Ontario (30 minutes) [Train station here also] A rental car is required.