Carmanah Pacific Park was established 13 March 1991 by Bill 28: The Carmanah Pacific Park Act, 24 July 1990, enacted by Order in Council 317, 13 March 1991. Name changed to Carmanah Walbran Park and boundaries expanded per Bill 53: Park Amendment Act 1995, 13 July 1995, the whole containing 16,450 ha. Redescribed per Bill 8-2015: Protected Areas of British Columbia Amendment Act, 25 March 2015, the whole now containing approximately 16,365 hectares.

Source: BC place name cards, or correspondence to/from BC's Chief Geographer or BC Geographical Names Office

An ancient old-growth rainforest, the Carmanah valley is home to some of the largest known trees in Canada: giant Sitka spruce reach heights of over 90m (300 ft), and can be 9.4m (31 ft) in circumference; Western red cedars here are estimated at 1,000 years old; this temperate rainforest contains nearly 2 times the biomass of a tropical rainforest.

Source: BC place name cards, or correspondence to/from BC's Chief Geographer or BC Geographical Names Office

The Carmanah Giant, a 400-year old Sitka spruce, is 9.4m around and 95m tall - the tallest tree in Canada and thought to be the tallest Sitka spruce in the world. Further description and explanation of old growth rainforest ecosystems in park pamphlet.

Source: BC place name cards, or correspondence to/from BC's Chief Geographer or BC Geographical Names Office