Thunder Bay Symphony Orchestra Association Inc.

Thunder bay symphony orchestra ('tbso') is a professional symphonic orchestra incorporated by the special act of the province of ontario. It's purpose is to promote orchestral music and to present a varied repertoire of live symphonic music for the benefit of the residents of thunder bay and the communities of northwestern ontario. It performs over a twenty nine week season between october and may in the city of thunder bay. Tours are also performed each season taking the orchestra to towns to both the east and west of the city.