Ang Ka Nature Trail has a fascinating and long history associated with the exploration of Doi Inthanon. Originally, this area was called Doi Ang Ka (Crow's Pond Mountain) after a natural pond on the summit where large flocks of crows used to gather to bathe, which eventually became the source of its name. The area has been studied by foreign zoologists and botanists since before World War II because its ecosystem is entirely different from other regions in Southeast Asia. It is classified as the highest mountain bog in Thailand, a very rare environment in tropical zones.

The characteristics of Ang Ka were formed by a high-altitude basin at approximately 2,500 meters above sea level, creating a wetland with nearly 100% relative humidity year-round. Over time, the management of this area evolved from a research site to the construction of a raised wooden boardwalk. This allows tourists to view the beauty without damaging the delicate soil ecosystem. This trail was developed as a "nature classroom" to demonstrate the importance of headwater forests, which act like a massive natural sponge, absorbing rainwater and slowly releasing it into the streams below.

The general atmosphere inside Ang Ka makes you feel as if you have stepped into a Jurassic-era primeval forest. As soon as you step onto the wooden boardwalk, you will feel the cold air and the mist floating among the trees. Every tree in this forest, from trunk to the highest branch, is covered in layers of moss, ferns, and lichens, making the original bark nearly invisible. The deep silence of the forest is punctuated only by the sound of dripping water and the calls of rare mountain birds, creating a mysterious and sacred atmosphere that photographers and nature lovers adore.

An unmissable highlight is observing the Sphagnum Moss, a large light-green moss that grows thickly on the ground and roots, serving as an indicator of air purity and perfect humidity. In the early months of the year (January - February), you will see the Rhododendron (Thousand-year rose) blooming in bright red against the green backdrop. There is also a chance to spot the beautiful "Green-tailed Sunbird" feeding on wildflower nectar. The atmosphere of Ang Ka is not just a walk with a view; it is a way to absorb the purest natural energy from the highest point in Thailand.

The Ang Ka Nature Trail is a key destination for anyone visiting Doi Inthanon. Despite being only 300 meters long, it is packed with stories of natural evolution. Walking through Ang Ka on a foggy day provides the deepest understanding of a "Cloud Forest." It is a place that inspires conservation and provides special memories through the touch of cold air and the sight of an emerald forest that has remained pristine for centuries.

• Private Car: From the Doi Inthanon summit parking lot, walk across the road to the visitor center; the entrance is right next to it.

• Public Transport: Take the yellow songthaew from Chom Thong to the summit parking lot and walk about 50 meters to the entrance.

• Path Conditions: Very easy; it is a flat wooden bridge suitable for children and seniors.

• Best Visiting Season: Accessible year-round, but moss is lushest in the rainy season (August-October), and flowers bloom in winter (December-February).

• Preparation: Bring a moisture-resistant jacket, as the forest is very humid and cold.

• Photography: Use a wide aperture (low f-stop) to capture the details of moss and dew drops for a refreshing, dimensional look.

• Birdwatching: For rare birds, visit in the early morning (06:00 - 08:00 AM) and remain quiet.

• Rules: Do not touch or pick any plants, and do not bring food inside to avoid disturbing wildlife with trash. 

Admission Fee:

• Local visitors: Included in the park entry fee (60 THB).

• Foreign visitors: Included in the park entry fee (300 THB).

Opening Hours:

• Open daily: 05:00 – 18:00