The Neptune Pool is an outdoor swimming pool ensemble at Hearst Castle, in San Simeon, California. As well as a large swimming pool, the terrace also includes fountains, ornamental pools, sculptures, marble pavilions, alabaster lanterns, dressing rooms, and a mainly reconstructed ancient temple facade.
The Neptune Terrace, including its huge pool shell, are raised up behind massive retaining walls on the Hearst Castle ridge-line in the Santa Lucia Mountains. It is to the north and lower than the main Casa Grande and the guest house terrace, with vistas of the ranch, Point San Simeon coastline, and Pacific Ocean.
In 2014, the pool was drained due to severe drought conditions in Southern California. The pool had been leaking and evaporating 5,000 US gallons (19,000 L; 4,200 imp gal) of water per day.[1] Extensive renovations began in 2017 to completely replace the pool's tile base and fix the leaks which had plagued it since its construction. The pool was temporarily filled for the first time since 2014 that August to make sure the leaks had been repaired before the water was subsequently returned to the local watershed.[2][3] In August, 2018 the pool restoration was completed and the pool was refilled.[4] In 2019, the pool was opened to the public by purchasing tickets with donations which helps fund the castle's art conservation and education programs.[5] The castle was closed to visitors in 2020 due to the COVID-19 pandemic.[6]