A teenager received serious head injuries after the ATV he was riding crashed into a tree Monday afternoon.
At 3:20 p.m., the Williams Lake RCMP responded to a report of an all terrain vehicle rollover on Frizzy Road near the River Valley Trail.
Two teenage boys were in the area of the River Valley Trail riding ATVs attempting to "high mark" the side of a steep slope.
An 18-year-old male lost control of the ATV on the steep slope and crashed into a tree at the bottom of the hill.
Police, fire and BC Ambulance responded to the call and the injured teen was transported to Cariboo Memorial Hospital with serious head injuries.
He was later airlifted to Royal Inland Hospital in Kamloops.
The Williams Lake RCMP are reminding operators of these types of vehicles to use helmets at all times.
Travel in pairs when possible and have a cellphone with you in case of emergencies.