Cascade-Siskiyou

About Cascade-Siskiyou

Cascade-Siskiyou National Monument protects the biological diversity of the convergence zone where the Cascade Range, Siskiyou Mountains, and Great Basin ecoregions meet. The monument contains one of the most diverse ecosystems in the Pacific Northwest, supporting rare plants, old-growth forests, and critical wildlife habitat. The area serves as an important corridor for species migration and contains significant geological features including volcanic formations. The monument is managed by the Bureau of Land Management (BLM).