The Mount Jefferson Wilderness is a protected area located in the Oregon Cascades of the United States. It encompasses approximately 53,000 acres of rugged terrain, featuring diverse ecosystems, including old-growth forests, alpine meadows, and volcanic landscapes. The wilderness is named after Mount Jefferson, the second-highest peak in the Oregon Cascades, which rises to an elevation of 10,495 feet. Established in 1984, the Mount Jefferson Wilderness offers numerous recreational opportunities, such as hiking, camping, and wildlife viewing. The area is home to various plant and animal species, including elk, black bears, and mountain goats. Its scenic beauty and natural resources make it a popular destination for outdoor enthusiasts.