The 18-hole "River Island" course at the River Island Country Club facility in Porterville, California features 6,872 yards of golf from the longest tees for a par of 72. The course rating is 73.5 and it has a slope rating of 135 on Bermuda grass. Designed by Bob E. Baldock/(R) Casey O'Callahan, the River Island golf course opened in 1963.