The Fremont National Forest is the eastern portion of the Fremont-Winema National Forest, which combined comprises a significant portion of south-central Oregon. Yamsay Mountain is located in the extreme north-northwest of the forest region.
The Fremont National Forest is a part of the Fremont-Winema National Forest, which together covers a substantial portion of south-central Oregon. Yamsay Mountain is situated in the extreme northern northwest corner of the forest region.