The Blue Mountains is a town in Grey County, southwestern Ontario, Canada, located where the Beaver River flows into Nottawasaga Bay. It is named for the Blue Mountain, and hence the economy of the town is centred on tourism, particularly on the Blue Mountain ski resort and the private Georgian Peaks, Osler, Craigleith and Alpine Ski Clubs.
The town was formed on January 1, 2001, when the Town of Thornbury was amalgamated with the Township of Collingwood. Thornbury is home to the architecturally unique L.E. Shore Memorial Library, named after the founding partner of the architectural practice of Shore Tilbe Irwin + Partners, and designed by the firm.
During the Southern Ontario Tornado Outbreak of 2009, a tornado passed through the Blue Mountains area on August 20. The tornado passed by Thornbury and hit Craigleith before moving out onto Georgian Bay.
