Phu Ruea is a mountain located in the Phu Ruea district of Loei province, Thailand. Standing at an elevation of 1,365 meters, the peak rises approximately seven kilometers north of Highway 203, situated between the towns of Loei and Phetchabun.
The mountain is part of the Phetchabun Mountains, a massif that serves as a natural boundary between northern Thailand and the Isan region. Its name is derived from its physical appearance, which resembles an upside-down boat when viewed from certain angles.