Thunderdrome is series of bicycle and small engine motorcycle races held at a long-forgotten banked track at Dorais Park, at Outer Drive and Mound Road. From BMX, to mopeds, to entry level dirtbikes.
On a sweltering hot day the most welcome change was beer sales. There were also some side attractions going on.
For the motorbikes, each race was ten laps. By the time the tenth lap came around, the lead racer was often well ahead of his competitors. No photo finishes, and it was common for the last place finisher to be lapped.