The challenges and benefits of the Pacific Northwest’s rugged but scenic terrain have received ample treatment in studies of religiosity in this region. The interplay of place and spirituality was first chronicled in detailed case studies of Christian missions and missionaries, rural and urban immigrants, and histories of the various Native American tribal groups of the Northwest Coast and Inland Empire. Currently, the focus is on trends unique to this region, such as interdenominational and interfaith ecumenicity in environmental and social justice campaigns, earth-based spiritual activism and conservation, emergent “nature spirituality,” the rise of religious non-affiliation (the so-called religious “nones”), and indigenous revitalization movements. Recent interest in cultural geography has produced several general works seeking to define the Pacific Northwest aesthetic and regional ethos, especially as depicted in the so-called “Northwest Schools” in art, architecture, and literature. Because the Cascade Mountain range bisects the Pacific Northwest into two radically different climate zones, literature on spirituality in the region often follows this natural topography and limits its locative lens to either the coastal zone (including the area stretching from Seattle to Southern Oregon) or the Inland Empire (the more arid zone east of the mountains from Spokane to Eastern Oregon). When the Pacific Northwest region is referred to more broadly as “Cascadia,” it includes Washington, Oregon, Idaho, northernmost California and Canada’s British Columbia.