The Brockville Ontario Speedway is a 3/8 mile dirt track in the community of Forthton, Ontario, Canada. It is located on County Road 29 about 10 km northwest of Brockville. Commonly known as "The BOS", the track has been running a weekly racing schedule for most summers since 1969. The BOS has also ran Go-Karts on Wednesday nights since 2005. They race on a smaller oval on the infield of the track.