Than Sadet-Ko Pha-ngan National Park

Open Days: Daily

Opening Hours: 08.30 – 16.30

 

Than Sadet-Ko Pha-ngan National Park, often searched by travelers as Than Sadet Waterfall National Park, is one of the most important nature areas on Ko Pha-ngan Island in Surat Thani Province. The park is not only a waterfall destination. It protects forested mountains, island watersheds, nature trails, viewpoints, waterfalls, beaches, and historically significant sites linked to royal visits by Thai monarchs. For travelers who want to understand Ko Pha-ngan beyond beaches and nightlife, this national park offers one of the clearest views of the island’s natural and cultural identity.

 

The park is open daily from 08.30 to 16.30. The entrance fee follows the national park rate for this group of parks: Thai adults 20 baht, Thai children 10 baht, foreign adults 100 baht, and foreign children 50 baht per person. Travelers should bring cash for fees and check weather conditions before visiting, especially when planning to go to Than Sadet Waterfall or Ao Than Sadet, because some routes are steep mountain roads and can become difficult during heavy rain or shortly after rainfall.

 

Than Sadet-Ko Pha-ngan National Park is important as a protected watershed area of Ko Pha-ngan. The area around Phaeng Waterfall was formerly known as Namtok Phaeng Forest Park before it was later declared a national park. Today, the park covers forested areas on Ko Pha-ngan and related natural zones around the island. Its landscape includes mountains, tropical forest, streams, waterfalls, rocky slopes, and coastal areas, creating a continuous ecological link from the island’s highlands down to the sea.

 

One of the park’s strongest attractions is the condition of its forest. Around Phaeng Waterfall and the nature trail, visitors can see shaded forest, clear streams, natural rock formations, and many plant species. A notable plant found in the park is Phetchahueng, also known as Wan Hang Chang, a giant orchid with stems that can grow more than 3 metres high. When flowering, its flower stalks can extend more than 2 metres, with large green to golden-yellow flowers marked by reddish-brown spots. This orchid has become one of the park’s most distinctive botanical highlights.

 

The forest also supports wildlife such as sambar deer, wild boar, dusky leaf monkeys, civets, and various bird species. Although Ko Pha-ngan is widely known as a tourist island, the park still preserves enough natural forest to serve as a living classroom for island ecology. These upland forests store and release water into streams and waterfalls, making the park essential not only for tourism but also for the environmental health of Ko Pha-ngan.

 

Another important natural feature is Khao Ra, the highest peak associated with the park, rising about 627 metres above sea level. Khao Ra is a key part of Ko Pha-ngan’s mountainous interior and one of the island’s important watershed areas. The higher terrain and forest trails give visitors a very different experience from the coastal areas, making it suitable for travelers who enjoy hiking, viewpoints, and quieter natural landscapes.

 

Phaeng Waterfall is one of the easiest and most popular areas to visit because it is where the park headquarters is located. The waterfall has several sections, including Phaeng Noi, Than Nam Rak, and Than Kluaimai. The local word “Phaeng” refers to small rock shelters or layered rock formations along the stream. Because water flows through these natural rock steps, the area represents the moisture and vitality of Ko Pha-ngan’s inland forest.

 

The Phaeng Waterfall area is a good starting point for visitors who want a manageable nature walk. The trail from Phaeng Waterfall to Dom Sila Viewpoint is about 2.5 kilometres and usually takes around 1 hour. The route follows the stream and waterfall area, with some moderately steep sections. Along the way, travelers can see forest plants, streams, rocks, orchids, and shaded woodland. Good walking shoes are recommended, and visitors should avoid stepping onto wet, slippery rocks.

 

Dom Sila Viewpoint is another key attraction within the park. It is located not far from the park headquarters and is especially popular in the late afternoon when the light is suitable for sunset views. The viewpoint is a good option for travelers who want a short forest walk with a rewarding view. Visitors should allow enough time for the round trip and return before dark for safety.

 

Than Sadet Waterfall is located in Ban Tai Subdistrict and has major historical importance. King Rama V visited the waterfall, named it, and regarded it as one of his favored places. The name “Than Sadet” is closely connected to royal visits and literally reflects the idea of a royal journey to this stream. This makes the waterfall one of the clearest examples of how Ko Pha-ngan’s natural landscape is connected to Thai royal history.

 

Than Sadet Waterfall is not a single vertical cascade but a stream system running over many rocks and natural pools. As the water strikes the stones, it creates the sound and atmosphere of a true island forest stream. Its appeal comes from the combination of flowing water, rock formations, shaded forest, and historical inscriptions on rocks near the waterfall.

 

Thai kings including Rama VI, Rama VII with his queen, and Rama IX also visited the area, and royal initials were inscribed on rocks near the waterfall. Because of this, visitors should treat the area with particular respect. Travelers should not carve, write, climb on, or damage any rock surfaces related to the royal inscriptions.

 

Ao Than Sadet and Than Sadet Beach add another layer to the experience. When arriving by boat in suitable seasons, visitors see mountains, unusual rock formations, and white sand before walking a short distance to the stream. However, boat access is not suitable year-round. From October to January, sea conditions are often not appropriate for boat travel to Than Sadet Waterfall. Travelers should choose their route according to the season and check local sea conditions in advance.

 

Traveling to Than Sadet Waterfall by road requires more caution than visiting Phaeng Waterfall. Some road sections pass through steep mountain terrain, and vehicles should be suitable for the route. During or after rain, roads can be slippery and difficult. Travelers unfamiliar with the route should consider using a local driver or checking with the park before traveling, especially when visiting with children, elderly travelers, or people who are not used to mountain roads.

 

Khao Ra is suitable for more active travelers who want a forest hike and a broader view of Ko Pha-ngan. The trail offers a stronger mountain-forest experience than the shorter routes near Phaeng Waterfall. On clear days, viewpoints in the area can reveal coastal scenery, bays, the surrounding sea, and distant island landscapes. This route is better for visitors who have enough time, good footwear, and sufficient physical readiness.

 

The best time to visit the park depends on what travelers want to do. For waterfalls, the best experience is usually when there is enough water flow after the rainy period, but not during heavy rain. For hiking and viewpoints, morning or early afternoon is preferable so visitors can return before dark. On an island, weather and sea conditions can change quickly, so flexible planning is more useful than relying on a fixed itinerary.

 

Getting There begins with traveling to Ko Pha-ngan by ferry, commonly from Don Sak Pier in Surat Thani to Thong Sala Pier. Thong Sala is the island’s main transport and service hub, with local transport, rental vehicles, hotels, restaurants, banks, and tour services. From Thong Sala, visitors can continue by car, rented motorcycle, or local transport to Phaeng Waterfall and the park headquarters. Travelers going to Than Sadet Waterfall should plan more carefully because the road is steeper and more demanding.

 

A practical itinerary is to begin at Phaeng Waterfall and Dom Sila Viewpoint in the morning, then continue toward Ao Than Sadet, Than Sadet Waterfall, or the eastern beaches such as Thong Nai Pan Yai and Thong Nai Pan Noi. Travelers with more time can stay near Than Sadet or Thong Nai Pan to avoid rushing. This route combines forest, waterfall, viewpoint, beach, and historical interest in a single trip.

 

Visitors should respect both nature and historical remains. Do not litter, collect plants or orchids, feed wildlife, or make excessive noise. Swimming should be done only in safe areas, and visitors should avoid strong currents and slippery rocks. Responsible travel helps preserve Than Sadet-Ko Pha-ngan National Park as a natural attraction, learning area, and protected watershed for the island.

 

Than Sadet-Ko Pha-ngan National Park is therefore much more than a waterfall stop. It combines the conservation story of the former Phaeng Waterfall Forest Park, the ecological value of island forests, the scenic beauty of Phaeng Waterfall and Than Sadet Waterfall, the Dom Sila nature trail, Khao Ra, and historical evidence of Thai royal visits. For travelers who want to see the deeper side of Ko Pha-ngan, this park is one of the island’s most meaningful places to visit.

 

 

A: The park is open daily from 08.30 to 16.30.

 

A: The entrance fee is 20 baht for Thai adults, 10 baht for Thai children, 100 baht for foreign adults, and 50 baht for foreign children per person.

 

A: Phaeng Waterfall is where the park headquarters and the Dom Sila nature trail are located. Than Sadet Waterfall is in Ban Tai Subdistrict and is historically important because several Thai monarchs visited the area.

 

A: Visit when there is enough water flow for the waterfalls but avoid heavy rain. For hiking and viewpoints, morning or early afternoon is best so you can return before dark.

 

A: From Thong Sala Pier, travelers can continue by car, rented motorcycle, or local transport to Phaeng Waterfall and the park headquarters. The road to Than Sadet Waterfall is more mountainous and requires suitable transport.

 

A: No. Boat travel to Than Sadet Waterfall is not suitable throughout the year, especially from October to January when sea conditions are often unfavorable.

 

A: The park is suitable for travelers interested in waterfalls, short hikes, viewpoints, forest nature, royal history, and a quieter side of Ko Pha-ngan beyond the beach scene.