Khao Lampi – Hat Thai Mueang National Park was declared a national park on 14 April, 1986, and covers a total area of 45,000 rai. The national park has 2 sections; namely, the Lam Pi Range which comprises a long stretch of mountains of mostly igneous rocks of 60 – 140 million years old, and Hat Thai Mueang, a white sandy beach on the Andaman Sea.
The Lam Pi Range features evergreen forests of plant species like Yang (Dipterocarpus alatus), Takhian Thong (Hopea odorata), Krabak (Anisoptera costata), ferns, rattan, bamboo, etc. The topmost peak is Yot Khao Khamin, which is 622 metres high.
Hat Thai Mueang features white sandy beaches in the west and a mangrove forest in the east, where the Park’s headquarters is situated. The fauna found within the Park include palm civet, sambar deer, red junglefowl, thick-billed pigeon, etc. Marine life includes stingray, mullet, flying fish, starfish, and small coral reefs.