I.

Introduction

Peace (river), river in northern British Columbia and northern Alberta, Canada. The Peace emerges from the eastern end of Williston Lake, near Hudson Hope, British Columbia, and flows 1,923 km (1,195 mi) through the foothills of the Rocky Mountains, across the Alberta prairie, and into the Slave River. The Peace is one of the primary tributaries of the Mackenzie River system, the longest river system in Canada.