John Rudolphus Booth was a Canadian lumber tycoon and railroad baron. He controlled logging rights for large tracts of forest land in central Ontario, and built the Canada Atlantic Railway to extract his logs and to export lumber and grain to the United States and Europe. In 1892, his lumber complex was the largest operation of its kind in the world.

The Canada Atlantic Railway (CAR) was a North American railway located in Ontario, southwestern Quebec and northern Vermont. It connected Georgian Bay on Lake Huron with the northern end of Lake Champlain via Ottawa. It was formed in 1879 through a merger of two separate railway companies that John Rudolphus Booth had purchased, and reached its full extent in 1899 through a third company that he had created. The CAR was owned by Booth for several years after its completion until he agreed to sell it to the Grand Trunk Railway (GTR) in 1904.