Bus from Kuhmo to Suomussalmi (via Lentiira). Only on school days, not in summer time.
To reach Lake Lentiira take the Kuhmo-Suomussalmi road (No.912) and drive 43km north towards the Lentiira village. At Käntinsalmentie crossroads you should turn to left (to the west). The car park is on the left side of the road immediately after the crossroads.
There is parking area immediately after you turn to left at Käntinsalmentie crossroads.