Brown attended the Aldergrove Beach Rock Festival at the time. (Mike Brown)After they arrived in Vancouver, the group of friends caught wind of the Aldergrove Beach Rock Festival in Langley, B.C., and decided to go. The Aldergrove Beach Rock Festival took place over the May long weekend in 1969 and attracted about 30,000 people from across the Lower Mainland and the U.S. About 30,000 people attended this outdoor music festival in Langley, B.C. In 1969, many people, especially parents, were terrified at the idea of a huge outdoor music festival that would attract hippies and drugs.

Source: CBC News May 18, 2019 14:00 UTC