Orillia OPP is investigating a serious single ATV collision in Severn Township.
Saturday at 9:30 pm, police responded to the rollover, which ejected the driver on Taylor Line, near Upper Big Chute Road.
Police say the rider was wearing a helmet but had to be taken to hospital, and later to a Toronto-area hospital by Ornge with serious injuries.
If you saw the collision and could help with the police investigation contact the OPP.