The 2007 Grass Ski World Cup began on July 12th in Dizin and ended on September 15th in Rettenbach . Three slaloms, five giant slaloms, two super Gs and two super combinations were held for women and men. The highlight of the season was the Grass Ski World Championship , which took place from September 6th to 9th in Olešnice v Orlických horách , Czech Republic .