Thousand Islands Bridge Thousand Islands Bridge The Thousand Islands International Bridge () is an international bridge system over the Saint Lawrence River connecting northern New York in the United States with southeastern Ontario in Canada. Constructed in 1937, with additions in 1959, the bridges span the Canada–US border in the middle of the Thousand Islands region. All bridges in the system carry two lanes of traffic, one in each direction, with pedestrian sidewalks. The bridge is managed by an American company. The actual international border bridge crossing is a set of two parallel long bridges between Wellesley Island in the United States and
Thousand Islands Railway build the line; that company already operated steamship docks in the village. The original line opened 1 January 1884. The company name was changed to Thousand Islands Railway four months later. A swing bridge over the mouth of the Gananoque River was constructed in 1894 to provide service to businesses on the east side of the river. The line originally served to carry timber and freight to Gananoque's docks, where it could be loaded onto ships. While available timber stocks soon diminished, passenger traffic increased as the Grand Trunk under Charles Melville Hays promoted the tiny town as a vacation