A SOUTH Australian teenager who went missing in Victoria's high country while on a school camp has been found safe and well.

Tom McMahon, 15, was located in Merrijig near Mount Timbertop last night after a local resident reported seeing him near Mount Buller Road about 8.30pm (AEDT).

Police and family members went to the area and found him.

It is believed Tom, from Medindie, went hiking alone about 4am on Tuesday.