Doi Inthanon is the highest mountaintop in Thailand (2,565 meters above the sea level),it is the source of many rivers. it has cold weather throughout the year, particularly on the top of the National Park. In winter, the temperature at the National Park is below 0 °C and you also get a chance to see the blossom of Siamese sakura flowers all over the area. And in summer, despite hot weather in central Chiang Mai and nearby districts, it is still freezing on the top of Doi Inthanon and tourists should be prepared with thick clothes.