Doi Inthanon (Thai: ดอยอินทนนท์, pronounced [dɔ̄ːj ʔīn.tʰā.nōn]) is the highest mountain in Thailand. It is in Chom Thong District, Chiang Mai Province. This mountain is an ultra prominent peak, known in the past as Doi Luang ('big mountain') or Doi Ang Ga, meaning the 'crow's pond top'. Near the mountain's base was a pond where many crows gathered. The name Doi Inthanon was given in honour of Inthawichayanon, the last King of Chiang Mai, who was concerned about the forests in the north and tried to preserve them. He ordered that, after his death, his remains be interred at Doi Luang, which was then renamed in his honour.

Today, the summit of Doi Inthanon is a popular tourist destination for both foreign and Thai tourists, with a peak of 12,000 visitors visiting the summit on New Year's Day. In addition to a range of tourist facilities on the summit, there is also a Royal Thai Air Force weather radar station at the summit and the Thai National Observatory (TNO) at km44.