This guide presents site identification and interpretation information for forest ecosystems of the Vancouver Forest Region. Site identification is based on the biogeoclimatic ecosystem classification. The guide was prepared to assist users in describing and identifying forest sites and to provide management interpretations to assist users in preparing stand-level forest management prescriptions. The guide covers procedures for site assessment, a description of the biogeoclimatic units and the site units of the Vancouver Forest Region, management interpretations of tree species selection, slashburning, site productivity, competing vegetation potential, ground-based harvesting, pest risks of major conifer species, and wildlife diversity and habitat relationships. Appendices list indicator species; humus forms; keys to bedrock, hand-texturing soil, relative soil moisture regime, soil nutrient regime, and site sensitivity to slashburning; correlation of old and new biogeoclimatic and site units; and a site assessment form.