By 1953, Canadian Pacific had Dieselized its transcontinental passenger trains, necessitating a new “Through the Rockies” booklet. This edition contains all or nearly all of the text and maps, and most of the photos (though photos with steam locomotives have naturally been replaced).
Perhaps in response to CN’s Triangle Tours, this booklet also adds six new pages about CP’s second route across the Rockies over Crowsnest Pass. This route had its own fairly spectacular scenery, but unfortunately passenger service on it stopped long ago. Under the name of Royal Canadian Pacific, CP attempted to revive it, but it didn’t operate except as a private charter in 2014.