At a 2,565 meters above sea level, the summit of Doi Inthanon is almost always shrouded in mist. We are in northern Thailand, in Chiang Mai province, and this is the highest point in the entire country. The temperature here can drop to just a few degrees above zero in the winter mornings, a jarring contrast to the tropical plains below. The national park surrounding the mountain covers over 482 square kilometers of montane forest, and the network of trails that traverses it is among the best marked in northern Thailand.
The park is named after King Inthawichayanon, the last ruler of the Chiang Mai principality, whose ashes rest in a small chedi at the summit. This historical presence adds a level of significance to the journey to the top: one does not just walk through a forest, but along a route that intertwines nature, royalty, and Buddhist devotion.
The path to the summit and the moss forest
The most frequented route starts near the main parking lot and leads through a moss forest, known as cloud forest, where every branch and every root is covered with layers of intense green vegetation. The humidity is constant, the air smells of earth and resin, and light barely filters through the canopy of trees. This ecosystem is home to over 360 species of birds, including the Doi Inthanon Fulvetta, an endemic species observable only in this area of the world.
The trail is well-marked and does not require technical equipment, but the ground can become slippery after rain. Informational signs along the route describe the plant and animal species present, in Thai and English. The actual summit is also accessible by car along the paved road that runs through the park, but walking the trail allows one to immerse in a silence interrupted only by the singing of birds and the sound of water.
The royal pagodas of Naphamethinidon and Naphaphonphumisiri
Not far from the summit are two chedis built in 1987 and 1992 respectively, dedicated to King Bhumibol Adulyadej and Queen Sirikit on the occasion of their birthdays. The pagodas, named Naphamethinidon and Naphaphonphumisiri, are located on a scenic plateau surrounded by well-kept gardens with mountain flowers. The architecture follows the Lanna style, typical of northern Thailand, with golden decorations and colorful tile mosaics.
Surrounding the pagodas is a formal garden with paved paths, fountains, and flower beds that change with the seasons. In winter, between November and February, wild azaleas and some varieties of mountain orchids bloom. The contrast between the geometric rigidity of the gardens and the wild forest that surrounds them is one of the most visually memorable elements of the entire visit.
The waterfalls: Wachirathan and Mae Ya
The park is crossed by several waterways that feed visually striking waterfalls. The Wachirathan waterfall, about 30 meters wide, is reachable with a short walk from the parking lot and produces a cloud of water vapor visible from afar. In the rainiest months, between July and October, the flow increases significantly and the sound of the water can be heard even before seeing the waterfall.
The Mae Ya waterfall, considered by many to be the most beautiful in the park, requires a drive to the southern side of the park. It is less frequented compared to Wachirathan and the path that runs alongside it allows for viewing from different angles. The water cascades down about 280 meters along a rocky wall covered with ferns and mosses.
Practical tips for the visit
The entrance ticket to the national park costs 300 baht for foreigners (about 8 euros), plus a fee for vehicles. The best time to visit Doi Inthanon is between November and February, when temperatures are cooler, visibility is greater, and the forest is less humid. During this season, it is also more likely to spot migratory bird species.
It is advisable to arrive early in the morning, by 8:00 AM, to avoid the crowd at the most popular spots like the royal pagodas and the Wachirathan waterfall. Wearing layered clothing is essential: at the summit, the temperature can be 10-15 degrees lower than in Chiang Mai, which is about 80 kilometers south. The access road is paved and can be traveled by any vehicle, but in winter mornings, there may be thick fog that reduces visibility.
