Origin Notes and History:
Decision in Place Names of Alberta, 1928.
Source: Canadian Geographical Names Database, Ottawa
Extends 10+ miles from Surprise Point in Alberta (above Amethyst Lakes), thence northwesterly along the BC-Alberta boundary between Paragon and Bastion Peaks, thence westerly between Geikie and Tonkin Creeks, and northwesterly to the junction of Tonkin Creek and the Fraser River.
Source: BC place name cards, or correspondence to/from BC's Chief Geographer or BC Geographical Names Office