The 18-hole "Lone Tree" course at the Lone Tree Golf & Event Center facility in Antioch, California features 6,427 yards of golf from the longest tees for a par of 72. The course rating is 71.2 and it has a slope rating of 125 on Rye grass. Designed by John F. Harbottle, III, ASGCA, the Lone Tree golf course opened in 1934.