Galena Bay is an unincorporated locality, on the bay of the same name, at the head of Upper Arrow Lake in the West Kootenay region of southeastern British Columbia. The bay was formerly called Thumb Bay, because it had the appearance of a giant thumb on early maps, but was renamed Galena Bay by 1890. Significant galena mining occurred in this area. In 1897, a townsite called Rosenheim was cleared, and a hotel built, for a planned railway linking with Camborne and Trout Lake, but the project evaporated within a year. Galena Bay remained the name of the neighbourhood.