RayakoskiRayakoski is a rural locality in Pechengsky District of Murmansk Oblast, Russia, located adjacent to the tripoint between Finland, Norway, and Russia. Population: 238.OverviewThe settlement of Rayakoski emerged during the construction of the Rayakoski Hydroelectric Power Plant in 1955 and 1956. The Muotkavaara border tripoint between Russia, Finland and Norway is located nearby.