Forest Lake - Hardcoverby Justin Brink (Author) Like so many of the places that lined the route from St. Paul to Duluth, Forest Lake came of age as a railroad town and was first incorporated as a township in 1874. Situated on a lake by the same name, it soon became known as a resort town where many residents from the Twin Cities could leave their cares behind for some fishing and sunbathing. Because of its secluded nature, it also attracted well known gangsters of the era.