Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Cascade Mountains leeward forests are a temperate coniferous forest ecoregion of North America, as defined by the World Wildlife Fund categorization system. This is a band of mountain habitat running north-south along the leeward side of the Cascade Mountains in British Columbia, Canada and Washington, United States, with the Okanagan Highland to the south on the US-Canada border and the Chilcotin Ranges to the north.