A guide to all the best sites with information on the Yukon River system, by ExploreNorth. The Yukon River is a major watercourse of northwestern North America. Changing the gray street outreach. The source of the river is located in British Columbia, Canada, from which it proceeds to flow. THE gracious reception given to my several reports of field studies among primitive racial groups , the many requests for copies of. Yukon river inter tribal watershed council. The Columbia River is the largest river in the Pacific Northwest region of North America. The river rises in the Rocky Mountains of British Columbia, Canada. The Loblaw Water Fund is designed to help improve the health of , streams., address the threats to freshwater ecosystems across Canada, rivers, including lakes TABLE OF CONTENTS PREFACE.