The 18-hole "New Castle" course at the Avalon Field Club At New Castle facility in New Castle, Pennsylvania features 6,657 yards of golf from the longest tees for a par of 72. The course rating is 70.3 and it has a slope rating of 129 on Bent grass. Designed by A.W. Tillinghast, the New Castle golf course opened in 1923. Avalon Holdings manages this facility.