Salient means standing above or beyond the general surface or outline; jutting out; prominent among a number of objects. The feature was mentioned, and probably named, by the interprovincial boundary survey in 1922.
Wheeler, Arthur O. and Cautley, R.W. Report of the Commission appointed to delimit the boundary between the Provinces of Alberta and British Columbia. Part III-A. Topographical surveys of the watershed. 1922, 1923, 1924. Ottawa: Office of the Surveyor General, 1924.