Pacific Border provinceThe Pacific Border province is a physiographic province of the Physiographic regions of the world physical geography system.DescriptionThe Pacific Border province encompasses most of the North American West Coast of [the United States|Pacific Coast], with the southern end at the start of the Lower California-Peninsular Ranges Province in Southern California. The Pacific Border province is in the larger Pacific Mountain System Division—Region. The region is prone to earthquakes, residing along the eastern edge of the Pacific Ring of Fire.SectionsThe Pacific Border province contains seven separate and smaller sections:Puget TroughOlympic MountainsOregon Coast RangeKlamath MountainsCalifornia TroughCalifornia Coast RangesTransverse Ranges