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