Police say the child died in hospital after he was struck Tuesday evening while walking along a highway in the community of Athabasca.
Investigators believe a minivan hit the youth and propelled him into the ditch.
Charges are pending against a 36-year-old woman from the Athabasca area.
In Calgary, police are looking for witnesses in another hit and run that killed a woman in the city's northeast.
They say officers found the woman dead in the westbound lane of a major thoroughfare and her injuries were consistent with being struck by a vehicle.
(CHQR, The Canadian Press)