Waterproof Map of Tweedsmuir provincial Park (British Columbia) published by ITM. This park is located west of the Chilcotin in the central western part of the province. The southern part follows historic Highway 20 west through exotic-sounding towns like Tatla Lake and Anahim Lake to Bella Coola and the fiords of the province’s west coast. This park, named after another Governor-General, is a canoeing paradise, especially along Whitesail and Eutsuk lakes, and also includes the western half of the Aleander Mackenzie Trail. Contours. Scale 1:250,000.