The 18-hole "Diablo" course at the Ridgemark Golf Club and Resort facility in Hollister, California features 6,582 yards of golf from the longest tees for a par of 72. The course rating is 72.3 and it has a slope rating of 126 on Blue grass. Designed by Richard Bigler, the Diablo golf course opened in 1974. Sierra Golf Management Co. manages this facility, with Chad Jackson as the General Manager.