The BC Coroners Service says Olivia Robertson of Collingwood, Ont., and Valentine Leborgne of Los Altos, Calif., were in a vehicle that crossed the centre line and slammed into a pickup truck.
Robertson was driving and Leborgne was a passenger in the Jeep Cherokee that was heading north towards Whistler on Saturday morning.
Two other women in the back seat survived the crash, although one of the women was taken to hospital with serious injuries.
The driver of the truck suffered minor injuries.
The coroners service and the RCMP are both investigating.