A 20-year-old man who was riding without a helmet, lost control of his ATV and plummeted down an embankment in the Royalton Ravine on Sunday afternoon.
Responders to the accident included those from the Gasport, Terry's Corners and Wendelville Fire Companies.
The man had to be hauled out of the ravine before being taken by ambulance to a landing zone for Mercy Flight.
Niagara County Sheriff Deputies say he suffered a head injury and was shipped by Mercy Flight to ECMC from there. His name is not being released at this time.