Doi Pha Khlong National Park covers parts of Long, Mueang Phrae, and Sung Men in Phrae Province. The park spans approximately 78,125 rai (125 square kilometers) and is characterized by steep mountain ranges and dramatic limestone landscapes rising 300–700 meters above sea level.

The area serves as an important watershed for the Yom River, with several tributaries including Huai Khamin, Huai Pha Kham, Huai Bia, Huai Nam Rin, Huai Mae Ta, and Huai Mae Sang. Some zones have been restored with teak plantations to rehabilitate forest ecosystems.

Historical Background

In 1987 (B.E. 2530), the Phrae Forestry Office established the area as Maharaj Stone Garden Forest Park to honor His Majesty the King on the auspicious occasion of his 5th cycle birthday anniversary. It was later designated as a national park to preserve its unique geological and ecological significance.

Climate

• Cool Season (Nov–Feb): Cold mountain weather, average 8–12°C

• Hot Season (Mar–Apr): Moderate heat, average around 30°C

• Rainy Season (May–Oct): Frequent rainfall, lush green landscape

Forest and Wildlife

The park mainly consists of deciduous forest, divided into:

• Mixed deciduous forest with valuable timber species such as teak, padauk, makha, rosewood, and takhian.

• Dry dipterocarp forest featuring teng, rang, and other drought-tolerant species.

Wildlife recorded in the area includes serow, barking deer, mouse deer, wild boar, slow loris, civet, squirrels, reptiles, numerous bird species, and freshwater fish.

Major Attractions

Maharaj Stone Garden

A stunning natural limestone field where rocks emerge dramatically from the ground in complex formations. Some resemble crocodiles, dinosaurs, or prehistoric creatures. Large boulders appear to balance precariously on smaller ones, creating a fairy-tale atmosphere.

Coral Limestone Ridge (Rock Fissure Field)

Formed by ancient tectonic movements and long-term rain erosion, the limestone surface developed sharp ridges resembling coral reefs. A wooden walkway leads visitors safely to the summit, where unique plants such as Dracaena loureiri (Chan Pha) and cacti grow naturally.

Pha Khlong Cave

Located at the base of the coral limestone hill, featuring beautiful stalactites and stalagmites.

Tham Chan Pha (Bat Cave)

A sizable cave inhabited by bats, with impressive limestone formations.

Kaeng Luang Rapids

Wide rock platforms in the middle of the Yom River. During the rainy season, rushing water crashes against the rocks, producing dramatic sounds and refreshing scenery.

Erawan Cave

Located across from Kaeng Luang Rapids. Inside is a large chamber with spectacular stalactites and stalagmites, some resembling the mythical three-headed Erawan elephant. Visitors can hire a local boat from Ban Kaeng Luang to cross the river.

Activities

• Nature trail walking

• Geological and cave exploration

• Scenic viewpoint hiking

• Landscape and rock photography

• Flora observation

By Car: 

• From Phrae town, take Highway No. 1023 (Phrae–Long) to approximately kilometer 25. The park headquarters is located directly along the main road.

Access to Kaeng Luang:

• Turn off Highway No. 11 (Den Chai–Lampang) and continue approximately 8 km to reach the rapids along the Yom River.

• The cool season (Nov–Feb) offers the most comfortable weather for hiking.

• Wear sturdy shoes, as limestone surfaces can be sharp and uneven.

• Bring a flashlight when visiting caves.

• Be cautious during the rainy season as trails may be slippery.

• Help preserve the park by not removing rocks or plants.

Admission Fee:

Thai Visitors: Adults 20 THB / Children 10 THB

Foreign Visitors: Adults 100 THB / Children 50 THB

Vehicles: Car 30 THB / Motorcycle 20 THB

Opening Hours:

• Open daily: 08:00 AM – 04:00 PM