Here is a 50-100 word summary of Ski Ostružná - Řetězárna: Ski Ostružná - Řetězárna is a ski resort located in the Czech Republic, offering 2 slopes with a total length of 500 meters. The resort has a height difference of 95 meters and is suitable for beginners and intermediate skiers. The resort features a snowpark, slalom, and speed measurement, as well as a 135-meter long moving carpet. The ski area is part of the larger Ostružná-Petříkov-Ramzová ski region, which offers over 20 km of groomed slopes. The resort is open daily from 9:00 to 16:00.