The Flaming Mountains or Huoyan Mountains, are barren, eroded, red sandstone hills in the Tian Shan of Xinjiang. They lie near the northern rim of the Taklamakan Desert and east of the city of Turpan. Their striking gullies and trenches caused by erosion of the red sandstone bedrock give the mountains a flaming appearance at certain times of the day.

Turpan is a prefecture-level city located in the east of the autonomous region of Xinjiang, China. It has an area of 69,759 square kilometres (26,934 sq mi) and a population of 693,988 (2020).