The Rancho San Marcos App includes a GPS enabled yardage guide, tee times, course info, Facebook, Twitter, weather and more. From the Moment we opened in January of 1998, Rancho San Marcos Golf Course has been a classic. Designed by legendary golf architect Robert Trent Jones Jr., this course became the talk of the community by offering a world class golf course on 300 spectacular acres. This course is both a treasure to behold and a strategic challenge that no golfer can resist with a staff of individuals dedicated to ensuring your golf experience is the finest it can possibly be.