Staff ReportsThe Tahoe high schools swept up the Tahoe Basin Ski League state championships earlier this week.North Tahoe won the girls combined championship and the girls giant slalom, South Tahoe won the boys combined, girls slalom and boys giant slalom and Truckee won the boys slalom.On Day 1 of the championships, competitors raced through two giant slalom runs with a championship on the line and then took one slalom run to earn seeding for Day 2.On Day 2, the format was dual slalom head-to-head races, with two runs each round.For Douglas, Tara Cottrill was Douglas' top finisher, taking 14th in …