Feel free to park in the large parking lot at Panská skála (freer and free of charge in winter). Cross the busy main road. Put on your cross-country skis after a few tens of meters and head to the Prácheň transmitter, to the Klučky quarry (nice view). Along the Lusatian highway (it is usually adapted to a classic) you get all the way over Polevsko. Depending on your strength, you can circle Polevský vrch all the way to Jedličná. Back along the same route.
Tip: Around Polevsko, the tracks are the most groomed. In the village there is a restaurant and bistro at the ski area (summer bike trails)