There are five National Forests within Siskiyou County that total approximately 60% of the County’s landbase. In order of size within the County, these are the Klamath (largest), Shasta-Trinity, Modoc, Six Rivers, and Rogue-Siskiyou. The websites for these National Forests are handy sources of information. Here are links to all the National forests:
Cascade Siskiyou National Monument Expansion
Oregon Senators Jeff Merkley and Ron Wyden asked the U.S. Department of the Interior to expand the Cascade-Siskiyou National Monument border by 64,000 acres, which would result in total coverage of the Monument being 130,000 acres, 10,000 of which would be in Siskiyou County, north and northwest of Iron Gate Reservoir. The Monument was originally established in 2000 by President Clinton through Proclamation 7318. Below is a letter submitted to Secretary of the Interior, Sally Jewell from the Siskiyou County Board of Supervisors regarding the proposed Expansion.
Update: On January 12, 2016, President Barack Obama officially expanded the Cascade-Siskiyou National Monument
On February 14, 2017, the Board of Supervisors approved a letter to the Trump Administration outlining Siskiyou County's concerns on the expansion of the Monument, and requesting assistance in the manner.
Klamath Reclamation Project and Klamath Refuges
Portions of the Bureau of Reclamation Klamath Project are located within Siskiyou County. Operations within the Klamath Project and the Klamath River affect Siskiyou County in many ways, including the proposed Dam Removal. Additionally, portions of the Klamath Refuges are located within Siskiyou County. Below is a link to the Klamath Reclamation Project, the Klamath Refuges, and documents on the current status of Klamath Dam Removal.