RCMP say the 19-year-old was in a vehicle with two younger men when they went off a road near Lac La Biche (BISH) on Tuesday evening.
Two of the occupants were ejected.
The older man was airlifted to an Edmonton hospital where he died yesterday.
The other two, who are both 18, are in stable condition.
Police say alcohol is believed to have been a factor in the accident.