B.C. Ambulance spokesperson Ben Mittelsteadt says all four injured have been transported to Kelowna General Hospital.
The accident happened around 11 a.m. PT Saturday, said Mittelsteadt.
He says ski resort staff told ambulance the incident involved a chair lift that became detached and fell about six metres.
Middelsteadt says one critically injured person was taken to hospital by helicopter and the other critically injured person was transported in an advanced life support ground ambulance.