Two hundred Utah ski patrollers returned to work Thursday after voting to accept a new labor contract and end a nearly two-week strike that closed many trails and caused long lift lines at the ones that remained open during a busy time of year at the country’s biggest ski resort. The Park City Ski Professional Ski Patrol Association claimed victory, saying in a statement that Broomfield-based Vail Resorts, which owns Park City Mountain Resort, acceded to its key demands including a $2-an-hour base-pay increase and raises for senior ski patrollers. “This contract is more than just a win for our team — it’s a groundbreaking success in the ski and mountain worker industry.