Bracebridge OPP have issued an appeal to sledders to use caution on the trails.
They were called to three snowmobile crashes Friday and Saturday, that resulted in injuries.
The first occurred in Bracebridge on Beaumont Drive where a sled hit parked vehicle.
There was also an incident in Gravenhurst involving a person being thrown from a machine and the sled rolled over him.
A third rider was hurt after a snowmobile hit a tree.