Port Moody police Inspector Ken MacDonald says the woman was riding on her scooter alongside her daughter around 3:30 p.m. PT when she was struck by a large commercial truck.
MacDonald says two other vehicles were also involved in the collision. The occupants of both vehicles have been taken to hospital.
Police say Ioco Road between Newport Drive and Ravine Drive will remain closed for at least the next 12 hours.
MAP: Ungless Way and Ioco Road, Port Moody, B.C.