According to the homepage  of Critical Mass in Bergen, rides were held in the years from September 1995 to 2000. One of the reasons to start a Critical Mass was the bad situation for bicyclists in Bergen at that time. They criticized the lack of enough bike lanes and -roads and wanted to advise the politicians of their interests. In 2000 they realized that it´s time to find other ways to work for a better biking and gave up the Critical Mass rides.
The participation was differing. Usually about 30 bikers attended the rides, once 75 participated. They met on the first Thursday of every month at 4pm at Torgallmenningen.