🔄 Updated 21 Jun 2026
Pang Sida National Park straddles the line between Mueang Sa Kaeo district and Prachinburi province, a tangle of high ridges that connects to the Dong Phaya Yen-Khao Yai forest complex, Thailand's natural World Heritage site. The park headquarters sits about 27 kilometres from Sa Kaeo town; drive in along Highway 3462 (Sa Kaeo-Ban Kaeng Si Siat) and you'll reach it easily by car. What stands out here is the butterflies, the waterfalls, and forest air that's cooler than down below — good for both a day trip and a night spent in the forest.
Early-rains butterfly season — the reason people come
What put Pang Sida on the map is the butterflies. At the start of the rainy season, roughly early June into July, hundreds of species gather to sip minerals from the damp ground along the roadsides and streambanks. You'll see them the whole way up to the viewpoint, which is why the park runs a "Pang Sida Butterfly Festival" every year around this time. They come out in the biggest numbers mid-morning, from around 9am into the afternoon, once the sun warms up and the ground is still damp from the night before. Go too early or after heavy rain and you'll see far fewer.
- Best window — early June to July (the start of the rains), when butterflies are at their peak for the year
- Time of day — around 9am to 2pm, when the sun is warm and the ground is damp and they gather in the greatest numbers
- Where to find them — along the road up to the viewpoint, by the streams, and in damp seeping mud hollows
- Don't disturb them — look and photograph all you like, but don't catch or chase them; some species are rare
Tips for spotting butterflies
To see the most butterflies, pick a day after rain the night before, then arrive when the morning sky is starting to clear — the ground is damp at just the right level and the sun is out. Wear light-coloured clothing, walk slowly along the roadside, and don't step into the clusters resting on the ground. During the festival, get there early because it gets busy and parking is limited.
Want more out of Sa Kaeo? 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.
Pang Sida Waterfall — easy to reach, swim-friendly
Pang Sida Waterfall is the park's main and most accessible waterfall, only about 800 metres from the headquarters along a short forest trail. The water drops from a cliff around 8 metres high into a wide pool below where you can swim when the current isn't too strong. In the rainy season there's more water and it runs harder; in the dry season the flow drops but it's still good enough for a dip. Families come here often to swim and have a picnic, since it's close to both the car park and the headquarters.
Pha Takian Waterfall — for the hikers
Pha Takian Waterfall sits deeper in, about 3 kilometres from the park headquarters and roughly 2.5 kilometres from Pang Sida Waterfall, reached by hiking in along a nature trail. The falls drop from a cliff around 20 metres high, and in the rainy season the water cascades down in tiers far more impressively than in the dry months. Because it's a long walk and the path can get slippery during the rains, it suits people who enjoy hiking and come prepared. Ask the rangers about trail conditions before heading in, and don't go alone.
- Pang Sida Waterfall — ~800m from HQ, easy walk, ~8m high, with a pool you can swim in
- Pha Takian Waterfall — ~3km from HQ, requires a hike, ~20m high, cascades in tiers during the rains
- Best water — rainy season into early winter, when the water is plentiful and clear; flow drops in the dry season
Swim safely at the falls
In the rainy season water can rise fast and run hard. Check the water level and colour before getting in — if it's murky and reddish, that means rain up on the mountain, so stay out. Wear non-slip shoes, watch for mossy rocks, and never let children in the water unsupervised.
Viewpoints and other nature in the park
Beyond the butterflies and waterfalls, the road up to the ridge has a viewpoint looking out over a wide sweep of green forest — best in the early morning with mist drifting through, and again in the evening with warm light. The viewpoint area is also a good spot for butterflies during the rains. Pang Sida is home to a programme that breeds and releases Siamese freshwater crocodiles back into the wild, since the streams here are their original habitat. Other wildlife you might cross paths with along the way includes birds, squirrels, and the tracks of larger animals deeper in the forest.
Fees, opening hours, and staying overnight
- Park entry — around 40 THB/person for Thai adults, about 30 THB/car
- Campground — there's a campground near the visitor centre, around 30 THB/person to pitch, with tents for rent at around 300 THB/night (sleeps ~3)
- Park bungalows — bungalows can be booked through the DNP online reservation system (nps.dnp.go.th); book ahead, especially during the butterfly festival and long weekends
- Facilities — there's a restaurant, restrooms, and a visitor centre around the headquarters
Book your stay ahead
Bungalows and the campground fill up fast during the butterfly festival (June-July) and on long weekends. Book bungalows through the DNP website in advance; for the campground, just expect crowds on holidays. If you'd rather not stay inside the park, there are small resorts near the entrance to choose from.
Getting to Pang Sida
The park headquarters is about 27 kilometres from Sa Kaeo town. The easiest way is to drive yourself, taking Highway 3462 from town toward Ban Kaeng Si Siat — there are signs the whole way. The road inside the park is a winding mountain climb; a regular car can manage it, but drive carefully, especially in the rainy season when the road gets slippery. Sa Kaeo has no airport and no public transport reaching the park directly, so if you don't have your own car, rent or charter one from town, since there are no taxis running inside the park.
Planning a Pang Sida trip
Pang Sida works as both a day trip and an overnight stay. For a single day, Pang Sida Waterfall plus mid-morning butterfly watching is plenty. But if you want to reach Pha Takian and catch the forest atmosphere at dawn, stay a night. Here's a rough plan you can actually follow, adjustable by season (focus on butterflies and waterfalls in the rains, views and cool air in winter).
Waterfalls, butterflies, viewpoint
Camp in the forest, hike to Pha Takian
Prep before heading into the forest
Bring insect repellent, non-slip shoes, a rain jacket in the wet season, and drinking water. Phone signal inside the park is limited. Pack out all your trash every time, and don't feed the wildlife. Some trails require checking in with a ranger first. If you're coming in the rainy season, check the weather and trail-opening status ahead of time too.
Want a full trip plan for all of Sa Kaeo
See the Sa Kaeo travel guide →