Cross-country ski tracks on the map: over 2700 municipal and resort trails in Finland, by municipality. Free to use, no account required.
2 762 places in
Most ski tracks are in Kuopio (107), Vantaa (79) and Espoo (56). The full list is below by municipality, and the map can be filtered to your own area.
The remaining places are on the map and in the municipality list.