It encompasses a substantial portion of Amphoe Chat Trakan .
Namtok Chat Trakan National Park is a national park located in Phitsanulok Province of Thailand , established in 1987 .
Namtok Chat Trakan National Park encompasses a substantial portion of Amphoe Chat Trakan .
Namtok Chat Trakan National Park is a national park located in Phitsanulok Province of Thailand , established in 1987 .