Nuuksio Classic is a trail running marathon in the Nuuksio National Park of Espoo, near Helsinki, Finland. It takes its participants to the finest trails and greatest landscapes of Southern Finland. There is only one distance, 42,2km = full marathon. The participation number is limited to 450 due to national park restrictions and organization’s capacity. The 2013 event sold out in few days.

More info: http://nuuksioclassic.com/english/