Kaeng Krachan is the biggest national park of Thailand spreading entirely over the Tanaosi mountain range and the West of Phetchaburi down to Hua Hin of Prachuap Khiri Khan Province.  It is the origin source of 2 main rivers in this area: the Phetchaburi River and Pran Buri River.
Kaeng Krachan is the source of a great ecological diversity.  There are several kinds of forest including dry dipterocarp, mixed deciduous, dry evergreen and Hill evergreen forests.  Most of the park is the moist evergreen forest where abundant rainfall creates vast variety of flora and fauna both in species and number.  As the park is the junction of north and south birds, more than 300 kinds of bird are found.  Some live permanently while some migrate here during the winter months.  Bird watchers and ordinary visitors will find it a good bird watching spot all year round.  Summer and the rainy season see broadbills, woodpeckers, and especially the Rufous Treepies which have been found only in Thailand so far.  Dry season brings various cuckoos, hawks and large eagles.

For nature-lovers who like to get closer to the rich western forest, trek along the main trail of Wangwon-Phanoenthung specially designed for you.