Here's a summary of Sjezdovka Severka in 50-100 words: Sjezdovka Severka is a ski resort located in Bílá Třemešná, Hradec Králové Region, Czech Republic. The resort offers 4.2 km of slopes for skiing and snowboarding. The exact location of the resort is unclear, but it is mentioned in relation to the nearby town of Bílá Třemešná. There is also a ski resort called Severák in the Liberec Region, which may be a different location. Further research is needed to confirm the exact location and details of Sjezdovka Severka.