"Lang Lake/Schoolhouse Park (a.k.a. Schoolhouse Lake Park)" established by Bill 53: Park Amendment Act 1995, 13 July 1995, containing 4545 ha. Name changed to Schoolhouse Lake Park per Bill 17-2000: Protected Areas of British Columbia Act, 29 June 2000; the whole still containing 4545 ha. more or less. Boundary redescribed per Bill 50-2004: Parks and Protected Areas Statutes Amendment Act, 17 May 2004; the whole now containing approximately 4535.5 hectares. Boundary extended per Bill 5: Protected Areas of British Columbia Amendment Act, 16 March 2013, the whole now containing approximately 5106 hectares.
Source: BC place name cards, or correspondence to/from BC's Chief Geographer or BC Geographical Names Office