The rules: http://www.ohpv.org/HPC/EventsNews.html

The winner: http://ecospeed.net/race.html

...The races were open to any electric assisted bicycle with legal power levels, though speed was not required to be regulated. Racers were divided into classes based on battery capacity and assigned a race distance proportional to that capacity. Classes were also subdivided based on aerodynamic aids as is the custom at OHPVA races...

15 laps (29.7 miles) later we took the checkered flag at a time of 50 minutes, 30 seconds. Average speed was 35.3 mph with peak speeds on the front straight of over 42 mph...