|Hill Size:||HS 205|
|Hill record:||214.5 m (Matti Hautamäki , 2002-03-09, SFWC)|
|214.5 m (Thomas Morgenstern , 2008-01-18, WC)|
|Inrun length:||118.5 m|
|Take-off length:||8 m|
|Take-off height:||4.62 m|
|Hill Size:||HS 142|
|Hill record:||151.0 m (Martin Koch , 2004-12-17, COC)|
|Official hill record:||145.5 m (Janne Ahonen , 2004-12-12, WC)|
|Year of construction:||1979|
|Ski club:||TJ Jiskra Harrachov|
In the 1970’s the Czechoslovak ski federation decided on common the project of the Czech Ing. Belonoznik and the Swiss Grasser to build the Čertak. After the o.k. of the FIS until 1979 at Čertak (in English devil’s mountain) the sixth ski flying hill on the world was created. At the same time next to it the large hill K120 was constructed and for this measure over 200,000 m³ of soil had to be removed.
In March 1980 the giant hill was opened during a ski flying week. In 1983 it had the first ski flying world championships with around 60,000 spectators. But in the following years the flying hill was criticized very much. Bad fallings were frequent and the air position at flying was to high with up to 12 m and so the FIS blocked the jumping facility. But this lack did not only concern this jump. Experts noticed at that time that a maximal air position of 5 m height is much safer for the jumpers and, however, large widths could be reached if the profile of a jump was adapted.
It was a fundamental realization in the way of building ski jumps and the up-coming V-style made profile changings necessary for nearly all jumps worldwide. Belonoznik reconstructed the flying hill from 1989 to ’92 according to newest standings, whereby the K-Point was changed on 185 m and a wind protection wall was installed. In 1996 Andreas Goldberger was the first one in an official competition to jump over the magic two 200 meter line on this jump with his 204 m.
In late summer 2009 floodlights were installed in order to be able to host further attractive competitions in the future on the Ski Flying WSC hill of 1983, 1992 and 2002 and the large ski jumping hill.
In preparation for the Ski Flying World Championships in 2014, the infrastructure around the hills was significantly improved already in 2012 and new spectator stands set up. Since then the ski jumping area with flying and large hill is called "adidas arena".