🔄 Updated 21 Jun 2026
Phaeng Waterfall sits inside Than Sadet–Koh Phangan National Park, right in the middle of the island, and it's the tallest waterfall on Koh Phangan. What makes it easy is how close it is to Thong Sala, the island's main town and ferry pier. It's only about 5–10 minutes by motorbike from Thong Sala to the entrance, so you don't have to tackle a long steep road like you would for Than Sadet or the northern beaches. That makes it a good half-day break from the beach and sea.
But the real draw isn't just the waterfall itself. From the falls you can keep climbing up to the Domsila Viewpoint, which looks down over a whole valley of green forest, the town of Thong Sala, the sea, and Koh Samui across the water. Wide views like this in every direction are rare on Koh Phangan.
Entry fee, opening hours and how to get there
Phaeng Waterfall is inside the national park, open during regular daytime hours, with a modest entry fee, and the trailhead is right by the car park, so you don't have to walk far to reach the first falls.
- Entry fee — around 100 THB for adults and around 50 THB for children (this is the local/general visitor rate at the gate), paid at the ticket booth by the entrance.
- Opening hours — roughly 08:00–16:30 daily. If you plan to hike up to Domsila, go in before 3 pm so you have plenty of time up and down before the gate closes.
- Parking — there's a lot for motorbikes and cars by the entrance, free at the moment.
- How to get there — from Thong Sala, ride a motorbike toward the middle of the island for about 5–10 minutes. Drop a pin for "Phaeng Waterfall" in Google Maps and follow it straight there. This stretch of road isn't as steep as the route to Haad Rin.
- Sign in and out — the park asks you to sign in at the gate before you head up, so they can track you down in an emergency. Don't forget to sign out when you come back.
Want more out of Koh Phangan? Book tours & activities
Booking online ahead on Klook or GetYourGuide is usually cheaper than the gate and skips the queue. Pick only the experiences you actually want — prices and availability are shown live on each site.
Phaeng Noi vs. Phaeng Yai
The waterfall comes in two sections, and you can reach both in a short time. It's great if you just want to stop by the falls and have a swim rather than hike high up the mountain.
- Phaeng Noi (the lower falls) — closest to the entrance, just a few dozen metres from the gate. This is where you get a clear look at the water coming down, good for photos and for bringing small kids to splash in the shallows.
- Phaeng Yai (the upper falls) — keep walking up the trail a bit further and you'll reach a deeper pool with a shadier feel. The last stretch has steps and ropes to hold onto.
- The easy option — if you only do these two falls, the round trip is about 800 metres and takes around 30 minutes there and back. It's light going, and kids and most adults can manage it.
When the water looks best
Phaeng Waterfall has the most water and looks its best after the rains, roughly August to December. From around March onwards in the dry season the flow drops a lot, and at times it's down to a thin trickle. If you're hoping for a proper swim, aim for the rainy season.
The trail up to Domsila Viewpoint
The highlight here is the climb up to Domsila. About 200 metres before the top of the waterfall, there's a turn-off on the left. Take it and keep climbing. The full trail is around 1.8 km and takes about 50 minutes, with roughly 165 metres of elevation gain. It's moderate, not brutal, but it isn't flat going either.
- Steep sections with rope handrails — before you reach the viewpoint there's a steep stretch of dirt and rock. The park has put up rope handrails to steady yourself, so climb up slowly, one step at a time.
- How long it takes — at a normal pace the climb up takes about 25–30 minutes, with stops for photos along the way. The way down is a little quicker, but watch your footing on the slippery parts.
- The longer loop — if you've got energy to spare and want a longer walk, there's a bigger loop past several waterfalls, around 2.9 km and roughly 1–1.5 hours. It's more challenging and suited to people who genuinely enjoy trekking.
The view from Domsila — what you can see
Once you reach Domsila, you come out onto a wide rock platform that opens up the view. You look down over a whole valley of green forest around Ban Madua Wan, with the little town of Thong Sala below, the open sea, and Koh Samui floating across the water. On a clear day you can see all the way to the horizon. A lot of people say that however much the climb up wears you out, this view makes it worth it.
Koh Samui & the Gulf of Thailand
A clear look across to Koh Samui on the far side, with the open sea below. It's a view you can find from only a handful of spots on the island.
Green forest in the island's heart
The rock platform opens onto a whole valley of green forest around Ban Madua Wan. It's quiet up here, with nothing but the sounds of the forest.
Thong Sala town from above
Look down and you'll see the town and ferry pier at Thong Sala small below you, giving a good sense of the island as a whole.
Best time for the view
Skip the midday heat, when it's blazing and the sky often turns hazy. Around 8–10 am the air is still cool and the sky is clear, or late afternoon before the gate closes gives you softer light. Just time your walk down to be out before 16:30, and don't get stuck on the mountain near dark.
What to bring and things to watch out for
This is a real forest trail, not a smooth concrete path. Coming prepared makes the trip a lot more fun and a lot safer, especially after the rains when the trail gets slippery.
- Shoes you can actually walk in — wear trainers or hiking shoes. Don't head up to Domsila in flip-flops, because the rock is slippery and the trail is steep.
- Drinking water — carry at least 1 litre each. There are no shops up the mountain, and the hot, humid air makes you sweat fast.
- Insect repellent and sunscreen — there are mosquitoes and bugs in the forest, so put on repellent, then sunscreen for the open rock platform.
- Avoid days with heavy rain — if the forecast calls for heavy rain, push your visit back, because the dirt trail gets slippery and the waterfall can run too hard to swim in.
- Don't go near the monkeys — there are wild monkeys around here. Don't feed them or get close, and watch your bag so nothing gets snatched.
- No alcohol or smoking in the park — it's a park rule. Help keep things clean and carry your rubbish back down with you.
If you ride your own motorbike
The route from Thong Sala to Phaeng Waterfall isn't very steep, but plenty of roads on Koh Phangan climb steep hills and people crash on them often. Always wear a helmet, ride slowly through the bends, and take extra care when the road is slippery just after rain. If you're not confident on steep roads, take a songthaew instead.
Where to go after Phaeng Waterfall
Because Phaeng Waterfall sits in the middle of the island near Thong Sala, it's easy to pair with somewhere else in a single day. Hike the falls and climb Domsila in the morning, then come down for lunch in town or carry on to a west-coast beach for sunset.
- Thong Sala — come down from the mountain and stop by the market and restaurants in town for lunch or an iced coffee.
- Ao Sri Thanu — ride on to the northwest coast and watch the sunset by the sea in this laid-back area to round off the day.
- Than Sadet — if you want to tick off another waterfall and you're confident on steep roads, Than Sadet on the east coast has both a waterfall and a quiet beach in one place.
Plan a full Koh Phangan trip — where to stay, eat and explore
See the Koh Phangan travel guide →