Overview
The park covers 307 square kilometres, spanning the border of both Phitsanulok and Loei Provinces, and is best known for its history, having supported a communist base from 1968-1972, as well as its geology. The geography is mostly mountainous with the highest peak at 1,820 m. Habitats are a mixture of deciduous, dry dipterocarp, dry evergreen, and hill evergreen forests. Unfortunately much of the evergreen forest was destroyed during the communist and government fighting, so the remaining areas are somewhat restricted. Much of the interesting geology, and some excellent views can be found along the two kilometre loop trail just southeast of the HQ. From a birding perspective, the most interesting species is Nepal House Martin, with Phu Hin Rong Kla being the only regular site in Thailand for this species, and which is assumed to breed here but not proven. The upland forest holds a selection of the usual northern montane species. This park is not well visited nor watched by birders. Jerdon’s Bush Chat has been found in the area, and Dusky Crag Martin is quite common. Information on this page verified/accurate as of 18 Apr 2015.