Grey Bruce OPP say they charged four people with stunt driving on the long weekend.
OPP say one was a 17 year old doing over 125 km/h an hour on Highway 10, near Markdale.
Another was a 25 year old Owen Sound driver doing over 135 km/h on Highway 26 near Woodford Crescent, in Meaford.
Police say a 58 year old from Richmond Hill was clocked at over 135 km/h on Highway 6 near Lawrence Road, in Northern Bruce Peninsula.
The fourth was a 23 year old from Brampton that OPP say was doing over 130 km/h on Highway 10 near Holland Centre.
They were all given a court date, had their licences suspended and their vehicles towed.