The best connection to Saariselkä by rail is with a bus connection from Rovaniemi Railway Station.
The VR State Railway trains operate a number of services between Helsinki and Rovaniemi every day. You can easily reach Saariselkä from Rovaniemi by bus, as there is a direct bus connection for each train arrival. On a car train you can put your own car on the train and drive it 270 km from Rovaniemi to Saariselkä. Or rent a car and drive by your self Car rental.
Detailed train timetables and prices: VR, tel. +358 600 41900.