page_title: Mount Thielsen Wilderness
hierarchical_section_title: Mount Thielsen Wilderness
caption_attribution_description: English: Mount Thielsen in the southern Oregon Cascades from near Diamond Lake
context_page_description: The Mount Thielsen Wilderness is a wilderness area located on and around Mount Thielsen in the southern Cascade Range of Oregon in the United States. It is located within the Deschutes, Umpqua, and Fremont–Winema national forests. It was established by the United States Congress in 1984 and comprises 55,100 acres.
context_section_description: The Mount Thielsen Wilderness is a wilderness area located on and around Mount Thielsen in the southern Cascade Range of Oregon in the United States.  It is located within the Deschutes, Umpqua, and Fremont–Winema national forests.  It was established by the United States Congress in 1984 and comprises 55,100 acres (22,300 ha).
caption: Mount Thielsen in October
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