The park's name originates from two separate forest areas: the Khao Lak mountain and the Lam Ru forest.
The elevation within the park reaches up to 1,077 meters at its highest peak, Khao Lak mountain.
The coastal portion of the park is home to significant geological granite formations that have been eroded by tide action over centuries.
The park contains a variety of forest types including evergreen, beach forest, and mangrove ecosystems.
It acts as a critical watershed area supplying water to the surrounding local communities in the Takua Pa district.
Khao Lak-Lam Ru National Park is a 125-square-kilometer protected area encompassing both rugged mountainous rainforests and coastal zones in Phang Nga Province. The park is defined by its dramatic granite cliffs that drop directly into the Andaman Sea. It serves as a vital habitat for diverse wildlife including hornbills, macaques, and various species of reptiles. The landscape features multiple hiking trails that connect the visitor center to the secluded Small Sandy Beach. Dense tropical vegetation provides natural shade throughout the interior trails. The park serves as a conservation zone for local watershed areas and coastal biodiversity. It is one of the few national parks in Thailand that offers direct, non-commercialized access to unspoiled coastline within the Khao Lak region.
The viewpoint overlooking the granite cliffs and the Andaman Sea near the park's coastal trail entrance.
Wear sturdy hiking shoes with good grip, as the forest trails can become slippery and steep after rainfall.
Carry insect repellent, as the humid forest environment is home to mosquitoes and sand flies.
Bring your own water and snacks, as facilities are minimal once you move past the visitor center.
Attempting to hike the forest trails during heavy rain due to mudslides and slick terrain; feeding the wild macaques.
Maintain silence to avoid disturbing wildlife, do not collect shells or coral, and carry out all trash.
