The 18-hole "Thunderhart" course at the Thunderhart At Sunnyhill facility in Freehold, New York features 6,863 yards of golf from the longest tees for a par of 74. The course rating is 72.1 and it has a slope rating of 125 on Blue grass. Designed by Dwayne Winn/William Gressick, the Thunderhart golf course opened in 1968.