Sai Yok National Park

Sai Yok National Park is a protected area in western Kanchanaburi Province, stretching along the Myanmar border and encompassing a rugged landscape of limestone karsts, caves, and river valleys. Established as Thailand's third national park in 1980, it covers approximately 500 km² of the Western Forest Complex. The park is best known for the Sai Yok Waterfall — made famous by the film Bridge on the River Kwai — but offers much more for nature enthusiasts: extensive cave systems, scenic river views along the Khwae Noi River, and diverse wildlife including Asian elephants, gibbons, and hornbills.

The park's climate follows the tropical pattern: hot (February–April), wet (May–October), and cool (November–January). The cool season is ideal for hiking and sightseeing. The rainy season brings stronger waterfall flow but can make trails slippery. The park is accessible year-round.

By Plane

The nearest airport is Suvarnabhumi (BKK) in Bangkok, about 200 km east. From Bangkok, take a bus to Kanchanaburi, then a minivan or songthaew to the park entrance in Sai Yok district.

By Train

The Death Railway line passes through Sai Yok district, with Nam Tok Station about 20 km from the park. Trains run from Bangkok's Thonburi Station to Nam Tok, from where you can hire a taxi or songthaew to the park entrance.

By Car / Road

Sai Yok National Park is about 3 hours' drive from Bangkok via Highway 4 (Phetkasem) to Kanchanaburi, then Highway 323 west towards Sangkhla Buri. The park entrance is well-signposted along Route 323. Buses from Kanchanaburi heading towards Sangkhla Buri pass the park entrance; ask the driver to stop.

A private vehicle is the most practical way to explore the park. The park headquarters can arrange local guides for cave and waterfall visits. Songthaews can be hired from Nam Tok station for day trips within the park.

• Sai Yok Waterfall (Nam Tok Sai Yok) — A large, multi-tiered waterfall on the Khwae Noi River, one of Kanchanaburi's most famous cascades. Strongest flow during and just after the rainy season (June–November). A popular picnic and swimming spot.

• Tham Lawa Cave — A large limestone cave near the park headquarters featuring impressive stalactites and stalagmites, accessible via a short trail.

• Tham Daowadung Cave — A cave known for its ancient prehistoric cave paintings, requiring a guide and torch to explore.

• Khwae Noi River viewpoints — Several scenic points along the river within the park offer views of the karst landscape and opportunities for photography.

• Swim in the Sai Yok waterfall pools during the dry season when the current is gentle.

• Explore the cave systems with a local guide — Tham Lawa and Tham Daowadung are the most accessible.

• Take a bamboo raft or long-tail boat trip along the Khwae Noi River through the scenic gorge.

• Hike the nature trails around the park headquarters, suitable for wildlife spotting.

• Camp by the river overnight for a full immersion in the forest atmosphere.

The park restaurant near headquarters serves simple Thai dishes during daylight hours (approximately 50–80 baht per dish). Several local restaurants along Highway 323 near the park entrance offer grilled fish, pad Thai, and rice dishes. Bring your own food for picnics at the waterfall.

Cold drinks and bottled water are available at the park shop and at restaurants along the highway. Tap water is not safe to drink. There are no bars within the national park.

• Budget: Park-provided camping (tent rental available at headquarters from 200 baht per night). Bring your own sleeping bag.
• Mid-range: Bungalows and cabins available for rent through the park reservation system (600–1,500 baht per night). Basic guesthouses outside the park along Highway 323 from 400 baht.
• Upscale: None within the park. The nearest upscale accommodation is in Kanchanaburi city.

A small shop near the park headquarters sells snacks, drinks, and basic supplies. There is no significant shopping within the park. Souvenir stalls operate outside the main entrance during peak season.

• Kanchanaburi (80 km east, 1.5 hr) — Bridge over the River Kwai and WWII museums.
• Erawan National Park (40 km north-east, 1 hr) — Famous seven-tiered Erawan Falls.
• Thong Pha Phum National Park (80 km north-west, 2 hr) — Khao Chang Phueak trek and viewpoints.
• Hellfire Pass Memorial Museum (45 km east, 1 hr) — WWII memorial and walking trail through the Death Railway cutting.