The latest incident happened Monday afternoon when a pickup truck veered over an embankment on Oyama Lake Road, killing a 17-year-old Lake Country boy at the wheel.
A 17-year-old passenger, a German girl, was critically injured and has been flown to hospital in Vancouver for treatment.
RCMP say both victims were thrown from the pickup and speed may have been a factor because witnesses report the vehicle skidded around a corner moments before veering over the edge.
A man and woman were killed along the same winding section of road, about 40 kilometres north of Kelowna, last Friday when their all-terrain vehicle veered over an embankment during a late night ride.
The coroner has not identified any of the victims. (CKIZ)