No special access issues
It is recommended to approach via Iittala by car, also when driving from South. Google Maps suggests driving Metsolantie from south, but the road is in bad condition from that direction.
From Iittala take Kotkajärventie, and drive 6,7 km and turn left to Metsolantie.
Drive 3,1 km and turn left (some 300m after the shooting range),
parking is on the right side of the road.