Mount Xiao or Mount Yao (Chinese: 崤山; pinyin: Xiáo Shān or Yáo Shān) is a range of mountains in western Henan, China north of the Luo River and south of Sanmenxia. Major peaks include Qīnggǎngfēng (青崗峰; 1903 m) and Guānyúnshān (冠雲山; 1666 m).
The place is also famous because there is a dispute over the pronunciation of its name. According to one of the most authoritative Mandarin Chinese dictionaries, the Cihai (辭海), xiáo should be yáo according to ancient pronunciation. However, other dictionaries such as Ciyuan (辭源), Xīnhuá Zìdiǎn, Hànyǔ Dà Cídiǎn, and Xiàndài Hànyǔ Cídiǎn use the pronunciation of xiáo.