Yainax Butte is a mountain in Oregon just south of the Klamath Reservation. Its name comes from the Klamath language and means “little hill.” The peak has also been known as Modoc Mountain, Bald Mountain, and Yonna Butte. Originally, the name Yainax Butte referred to a smaller mountain about 12 miles to the northwest, now called Council Butte, but common usage gradually shifted the name to the present peak, and the U.S. Board on Geographic Names made that change official in 1927. The butte is also associated with Toby Riddle, who lived there in her later years.