Clinton Designates Cascade-Siskiyou as First National Monument Created to Protect Biodiversity ↳ Part of Series

President Bill Clinton signed Proclamation 7318 on June 9, 2000, designating approximately 52,000 acres of federal land along the Oregon-California border as the Cascade-Siskiyou National Monument under authority of the Antiquities Act of 1906. The designation represented the first national monument established specifically to protect biological diversity rather than geological or archaeological features, marking a precedent in monument creation policy. Situated where the Cascade, Klamath, and Siskiyou ecoregions converge, the monument encompasses what the proclamation described as exceptional biological diversity unmatched in the Cascade Range. The area supports one of the highest concentrations of butterfly species in the United States, three endemic fish species including a long-isolated redband trout stock, and old-growth habitat essential for the threatened Northern spotted owl. Endemic plant species protected include Greene's Mariposa lily, Gentner's fritillary, and Bellinger's meadowfoam. The Jenny Creek portion serves as a significant center for freshwater snail diversity. The proclamation assigned management to the Bureau of Land Management and imposed several restrictions to preserve ecological integrity. Commercial timber harvest was prohibited except for science-based ecological restoration projects meeting old-growth enhancement objectives. All federal lands within monument boundaries were withdrawn from mining claims, mineral leasing, and geothermal leasing. The Secretary of the Interior received direction to study livestock grazing impacts on biological resources, with authority to retire grazing allotments if found incompatible with conservation objectives. The proclamation required development of a comprehensive management plan within three years addressing transportation planning and potential road closures necessary for resource protection.