Nineteen-year-old Joseph Pierre Roussel disappeared from the Jasper National Park area on July 11, 1977. He was 6 feet 1 inch, about 161 pounds, with brown hair, hazel eyes, a light complexion and a small scar on his left ring finger. He was in the area to climb Mount Edith Cavell and had been an army cadet who had recently enrolled in flight training.

When Joseph failed to return his family reported him missing and his hotel room in Jasper was checked. His clothing, money and other personal items were left behind, suggesting he had not planned an extended absence. About a month later his rental car was found near a river and a lake roughly 50 kilometers from Jasper, a location well away from the climb site.

Searches have been conducted but no definitive explanation for his disappearance has been reported. Does anyone who knew Joseph, his plans for that trip, or who was in the Jasper area in July 1977 have information that could help clarify what happened?