Phu Ruea (Thai: ภูเรือ), is a 1365 m high mountain in Loei Province, Thailand. It is located in Phu Ruea District, giving its name to the district. This mountain is part of the Phetchabun Mountains, a massif forming a natural boundary between North Thailand and Isaan. The peak rises 7 km north of Highway 203, between Loei town and Phetchabun and it is a good lookout to view the Mekong and the Hueang River valleys.