Sorry it took me some time to get to this.
Lake Elsinore was originally slated to be 36 holes of John Duncan Dunn golf for the Southern California Athletic Club. The first 18 was in fact built and it was located not far from the 15 right utilizing some fo that hillside that can be seen from the freeway.
The course sported what seems to be a unique practice facility called a 'driving range' where your caddy for the day fetched and retrieved your balls, fed them into a rope-like conveyor system and sent them back to the top of the range itself. To also go along with the golf down in Elsinore. (it was slated to be a retreat of sorts) The SoCal Atheletic Club also built Sepulveda CC, which was 18 holes that was originally going to be designed by JDD, but ended up turning those chores over to someone named William Park Bell, even though JDD would serve that club as it's head professional.