The ten geological field guides presented in this volume explore key areas of the geologist’s Paradise that is Washington State and British Columbia. These trips investigate a wide variety of geologic and geographic terrains, from the dry steppe of the channeled scablands and Columbia River basalt group to the east, across the glaciated and forested Cascade arc and Coast Mountains, to the geologically complex islands in the west. This guidebook may be unique in that four of the trips utilize boats to reach remote field areas and are therefore rarely visited by geologists. Although these trips were guided during the 2007 GSA Cordilleran Section meeting, the guides were written to ensure that people can easily guide their own trips. The result provides an excellent source of exciting, thought-provoking geologic adventures for years to come.