At the March 2013 annual meeting of the Forest History Association of Alberta, Dr. Peter Murphy delivered a presentation about "La Grande Traverse", one of the major portages on the fur trade route on the Columbia River.
The presentation videos are divided into five sections, and are available here:
Part 1: Overview and introduction to the route
Part 2: The route and first explorers
Part 3: The fur traders and adventurers
Part 4: Jasper House to the Athabasca River