🔄 Updated 21 Jun 2026
Khao Sam Roi Yot National Park sits across Sam Roi Yot and Kui Buri districts in Prachuap Khiri Khan province, and it was Thailand's first coastal marine national park. The landscape is a row of jagged limestone peaks along the sea mixed with wetlands. The name "Sam Roi Yot" — literally "three hundred peaks" — comes from the limestone summits that look like hundreds of points lined up together. The big draw is Phraya Nakhon Cave, but the park also has quiet beaches, a large freshwater wetland, and the Khao Daeng viewpoint — easily a full day out from Hua Hin.
Phraya Nakhon Cave and the Kuha Karuhas pavilion
The heart of the place is Phraya Nakhon Cave, a large limestone cavern whose roof has partly collapsed, letting a shaft of sunlight pour down onto the cave floor. In the middle stands the Kuha Karuhas pavilion, a Thai-style wooden hall built during the reign of King Rama V (1890) to welcome the king. When the late-morning light drops onto the pavilion's roof, you get the shot that many visitors say makes every step of the climb worth it. This is the image of Prachuap that's been on calendars and postcards for years.
When the light is best
The beam falls onto the pavilion most beautifully in the late morning, around 10:00–11:30, and it's clearest in the dry season (roughly Nov–Feb) when the sky is clear and the sun is strong. Start the climb before 10:00 to catch the light. If the sky is overcast or it's raining, the beam won't break through clearly — honestly, this is partly down to luck and the season.
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Reaching the cave — hike over the hill or take a boat
Phraya Nakhon Cave sits behind Laem Sala Beach, a small beach cut off from the outside by the hills. Everyone starts at Bang Pu village, and you can reach Laem Sala Beach two ways. Both end at Laem Sala, after which you climb another 430 metres or so up a steep slope to the cave.
- Hike over the hill — from Bang Pu you climb a low hill across to Laem Sala Beach. The path is a mix of steps and rock, not far but fairly steep. Most people take about 20–30 minutes. Free, no boat fee.
- Long-tail boat — from Bang Pu the boat runs along the coast to Laem Sala Beach, about 15 minutes. The fare is around 150 THB per person round-trip (it swings with group size and season, so ask first). Easier on the legs, plus you get a sea view.
- The final stretch is on foot for everyone — from Laem Sala Beach it's another 430 metres or so up to the cave, a steep climb. No boat or vehicle can take you up this part, so you'll need to walk it.
Honesty — the climb is tougher than it looks
Plenty of reviews agree that the final 430 metres up to the cave is fairly steep and hot. If you're with small children or older relatives who can't manage it, weigh it up first. Wear shoes with good grip (the cave floor is slippery), bring water, and save some energy for the way down. If it has rained beforehand, the path gets even more slippery.
Entry fees, opening hours and what to bring
- Park entry fee — around 40 THB per person for Thai nationals (children half price), and around 200 THB for foreign visitors. You pay once for the whole park; there's no separate cave fee.
- Opening hours — the park is open roughly 08:00–16:00. To catch the good light and have an easy walk back, aim to reach Bang Pu in the early morning, around 8–9 a.m.
- What to pack — water, non-slip shoes, a hat/sunscreen, and mosquito repellent. Parts of the cave and the trail can be buggy.
- Boat fare (if you choose to ride) — around 150 THB per person round-trip, paid separately from the park fee. The price depends on how many people share the boat.
Simply put: if you're coming as a family or don't want to wear yourselves out, take the boat to Laem Sala Beach and only do the short climb up to the cave — it saves a lot of energy compared with hiking over the hill the whole way. But if you enjoy a trek and want the views along the way, the hill crossing is fun in its own way.
Bueng Bua wetland — a vast freshwater marsh
Another corner of the park with a completely different feel from the cave is Bueng Bua, a large freshwater marsh that's an important wetland. A long wooden boardwalk leads you out into the middle of it, surrounded by lotuses and all kinds of water birds. Early morning is when you'll see the birds feeding and catch soft dawn light — great for nature photography and birdwatching. It's an easy walk with no climbing, a nice change of pace after the effort of the cave.
Water levels and lotus season
How pretty Bueng Bua looks depends on the water level and the season. In late rainy / early cool season the water is high and more lotuses are in bloom; in the dry season the water may drop. Before you go, check the latest conditions with the park's page or local people so you're not disappointed.
Khao Daeng viewpoint and the park's quiet beaches
If you've still got energy, Khao Daeng is a viewpoint with a short climb but a big payoff. From the top you look out over the wetlands, the canal, and rows of limestone peaks — really lovely. It's best in the morning or evening when the sun isn't harsh. If you'd rather just sit somewhere quiet, the park also has small beaches like Laem Sala Beach (the one that's the route up to the cave) and a mangrove boat trip along Khao Daeng canal to round out the day.
Khao Daeng viewpoint
A short, low climb up a hill. From the top you see the wetlands, the canal and rows of limestone peaks — great for wide shots in the morning or evening.
Khao Daeng canal boat trip
A boat ride through the mangroves to watch birds along Khao Daeng canal — quiet and peaceful. Arrange a boat near the community; price depends on group size, so ask first.
Driving from Hua Hin and planning your time
- Drive yourself — from Hua Hin take Phetkasem Road south about 63 km, roughly an hour, to the Bang Pu entrance. The drive is easy with signs all the way, and it's the best option since the park's spots are spread out.
- Rent a car / motorbike — if you don't have a vehicle, rent one in Hua Hin and drive down. A motorbike works for confident riders, but it's a fairly long ride and the sun is strong.
- Private car / join a tour — there are day-trip tours from Hua Hin to Phraya Nakhon Cave; prices swing with group size and what's included. Good if you'd rather not drive — compare a few operators first.
Khao Sam Roi Yot from Hua Hin
Honesty — be flexible about light and rain
The beam in the cave is at its best only on clear days and in the late morning. On overcast days or in the rainy season you may not see a sharp beam at all. If you're coming specifically for the light-beam photo, pick the dry season and check the forecast first. But even without the beam, the cave and the pavilion are still beautiful and well worth the trip.
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