The name "Cathedral Grove" is reputed to have originated from the Governor General of Canada, the Viscount Willingdon, in 1928, and appeared in correspondence to the provincial government in the 1920s. Cathedral Grove was a well-known tourist stop in the 1920s and 1930s, long before its protection. Over the following quarter century the public pressured and petitioned the provincial government to acquire the lands known as Cathedral Grove, and for the property and timber owners to donate the land. H.R. MacMillan, who had served as first chief forester of British Columbia and became a well-known forester and logging industrialist as head of the H.R. MacMillan Export Company (later MacMillan Bloedel), after years of refusing to consider the public demands, in 1944 donated the 136 hectares of his company's timber holdings "for the perpetual enjoyment of the public in recognition of the unique stand of trees." In 1947 the area was established as a Class A provincial park.