The trails at the Park City Mountain Resort should have been wide open over the holidays with plenty of fresh powder for the skiers and snowboarders who came to Utah’s Wasatch Mountains during one of the busiest times of the season. Instead, riders were forced to wait in line for as many as three hours to get on one of the few lifts that were actually open thanks to a labor strike against the Vail Resorts empire, which is worth more than $6 billion.