The park is home to a significant population of wild Asian elephants that can often be spotted near salt licks.
The park's altitude ranges from 100 meters at the reservoir to 1,513 meters at the summit of Khao Phanoen Thung.
It contains a high concentration of rare butterfly species, with over 300 types recorded in the valley areas.
Parts of the park remain strictly protected as wilderness areas to prevent habitat fragmentation for large carnivores.
The reservoir created by the Kaeng Krachan Dam is the largest inland water body in the region.
Kaeng Krachan is Thailand's largest national park, covering over 2,900 square kilometers across Phetchaburi and Prachuap Khiri Khan provinces. It is designated as an ASEAN Heritage Park and a UNESCO World Heritage site due to its critical biodiversity in the Kaeng Krachan Forest Complex. The landscape transitions from the reservoir-dominated lowlands to the dense, rugged mountains of the Tenasserim Range near the Myanmar border. It is a premier location for birdwatching, home to over 400 species, including the rare great hornbill. The Phetchaburi River provides the primary water source, feeding the massive Kaeng Krachan Dam reservoir. Mammal populations include Asian elephants, clouded leopards, and sun bears. The park is characterized by its high humidity and significant evergreen forest cover. Visitors often frequent the Pa La-U Waterfall, which consists of eleven tiers.
The viewpoint at the top of Khao Phanoen Thung during the morning sea-of-mist phenomenon.
Bring high-quality binoculars and a long lens, as wildlife is often shy and distant.
Use tick and leech repellent, especially when trekking in the humid forested sections.
Carry a portable power bank, as electricity is limited in remote camping areas.
Do not attempt to drive your own vehicle to the summit of Khao Phanoen Thung without checking current 4WD access regulations.
The upper forest zones, including Khao Phanoen Thung, are typically closed during the monsoon season for safety and environmental recovery.
Maintain a quiet demeanor to avoid scaring off wildlife; follow 'leave no trace' principles; do not feed animals.
