Mount Bailey, Volcanic summit in Douglas County, Oregon, US

Mount Bailey is a shield volcano in the Cascade Range, rising to 2,553 m on the opposite side of Diamond Lake from Mount Thielsen. Its summit is crowned by a tephra cone over 600 m high, built during several eruptive phases. The cone sits atop an older basaltic andesite shield, and the volcano has been inactive since about the early Pleistocene.

The summit was originally known as Mount Baldy, a name that described its bare, treeless top. A cartographer misread a surveyor's handwritten notes and recorded it as Bailey instead, and that mistake has stayed on maps ever since.

The Klamath name for the mountain is Youxlokes, meaning "Medicine Mountain". Klamath medicine men and priests fasted and feasted on the summit to commune with the upper world. In 1992 the Oregon Geographic Names Board named the peak for naturalists Vernon and Florence Bailey, though no person named Bailey had been linked to it.

The summit is reached by a hiking trail that starts from the Fox Spring trailhead near Oregon Route 230 and passes through forested terrain before opening onto the upper slopes. Winter conditions can be demanding, so visitors should check the weather carefully and come prepared before setting out.

The Klamath name for the mountain is Youxlokes, or "Medicine Mountain". Klamath medicine men and priests fasted and feasted on the summit to commune with the upper world, and Native Americans are credited with the first ascents of Bailey.