1935: Founding of the Sainte-Agnès-de-Bellecombe parish and celebration of the first Mass
1938: Opening of the Saint-Roch-de-Bellecombe parish with the settles from Asbestos, Magog, Lac-Mégantic, Coaticook, and Scottstown
1941, 1945, and 1947: several forest fires deplete the timber reserves on which the settlers depend for their livelihood
1954–1955: following the abandonment of the land and the migration of part of the population to the mines, summer camps are built and retail businesses resume thanks to hunting and fishing
Mid-1960s to early 1970s: political void and closure of the local school board following school regionalization
After 1969: end of religious services in Saint-Roch due to population decline
1975: merger of Saint-Roch with Sainte-Agnès
Late 1970s: young couples move to the area, leading to new construction
1979: incorporation as a municipality
2002: merger with the other municipalities of the MRC