The Mountain Nine is a nine-hole course at the Hidden Valley Country Club. The Mountain Nine was added two decades after Hidden Valley opened to offer even more golfing options. The course gets its name from its location nestled in the base of nearby mountains, offering scenic views. The fairways are gently rolling although not hilly. A lake creates a water hazard that comes into play on one hole. There are also bunkers throughout the golf course. Although both courses at the Hidden Valley Country Club offer challenge, this course is more suitable for beginning and intermediate players.
| Tee | Par | Yardage | Rating | Slope |
|---|---|---|---|---|
| championship | 36 | 3359 | 35.4 | 0 |
| forward | 37 | 2686 | 34.6 | 0 |
| middle | 36 | 3066 | 34.1 | 0 |