RCMP say two men at the camp, which is located about 50 kilometres of north of Stewart near Sulphurets Creek, were taking GPS readings on a steep slope when they were swept away by the avalanche.
One of the men was able to get free of the avalanche, but the other man — Pat Lawrence Desmarais, 50, of Telkwa — was carried over a 300-metre cliff to his death.
"Avalanche technicians and search crews from a neighbouring mine assisted in the search and located the 50-year-old deceased male," said a statement issued by Const. Lesley Smith.
A coroner from Terrace, B.C., is investigating.
B.C. coroner Barb McLintock says its very early in the season for an avalanche to claim a life, noting the first fatality last year was reported in mid-November.