RCMP say the truck driver lost control on a bend as he was travelling southbound on Highway 99.
UPDATE: The victim in a logging truck accident near Whistler has been identified as Hugh Craig Roberts, 65, of West Vancouver, the BC Coroners Service said in a Tuesday news release.
A northbound vehicle was also hit by the truck but police say the occupants were not hurt.
They were taken to a health care centre as a precautionary measure after the incident Saturday afternoon.
The truck driver has been hospitalized with undetermined injuries.
The highway is expected to be closed in both directions for several hours as investigators examine the scene.