The ping River is of kamphaeng Phet and as one of the two rivers join into the Chao Phraya River. The ping River flows in the Valley between the mountains to the ghost mountain road central allocation thongchai, water in the West. Chiang Mai lamphun province, flowing through the South with the river Palace at Amphoe ban Tak, Tak province, flowing south through the province of kamphaeng Phet and meets the Nan River at Nakhon sawan of Nakhon sawan province, mueang district. The ping River is 658 km in length.