Klamath-Siskiyou forests (WWF ecoregion) references on wikipedia
Klamath-Siskiyou_forests_(WWF_ecoregion) Klamath-Siskiyou forests are a temperate coniferous forest ecoregion in northwestern California and southwestern Oregon and is part of the ecoregion system establishe by the World Wildlife Fund (other systems and definitions exist). The ecoregion extends across of the southern Cascade Range and neighboring mountain ranges.