The outdoor Neptune Pool at Hearst Castle holds 345,000 gallons. By 2014 it was leaking up to 5,000 gallons a day through cracks in a ninety-year-old shell — so California State Parks drained it, spent roughly $10 million stripping more than 9,000 square feet of Vermont marble, waterproofing the basin, and putting the marble back. The pool refilled in August 2018. On a regular tour ticket, you still cannot put a toe in the water.
That pair of numbers — a multimillion-dollar empty monument you can only look at, versus a rare $1,000 fundraiser swim for fifty Foundation members — is the honest frame for both of Hearst’s famous pools. Here is what Neptune and the indoor Roman Pool actually are, what every tour includes, what is myth, and which visit is worth the Highway 1 detour.
Neptune Pool: three rebuilds and a $10 million shell
Julia Morgan, California’s first licensed woman architect and Hearst’s collaborator from 1919, designed and engineered the estate — reinforced concrete against earthquakes, landscape, and the integration of European antiquities. The outdoor pool was built and rebuilt three times between 1924 and 1936. The first 1924 “Temple Garden” pool was lengthened because Hearst’s wife and children wanted a proper swimming place; 1926–27 added a cascade; 1934–36 produced the final scale for colonnades and statues planned since the late 1920s.
Final dimensions: 104 feet long by 58 feet wide (widening to 95 feet at the alcove), 3.5 feet at the shallow end to 10 feet at the drains, lined with light-veined Vermont marble and green serpentine tile. A prostyle temple facade on the main axis was elaborated from parts of an ancient Roman temple Hearst bought in Europe. Colonnades carry 17th-century Italian Neoclassical bas-reliefs; the Neptune and nereids group moved into the temple pediment from the 1927 cascade. A later Cassou Neptune group for an upper pool was commissioned and never installed.
After the 2014–18 restoration, officials kept Neptune full even through 2022 drought restrictions — draining risks more cracking of historic materials, and the water also serves as emergency reserve and firebreak. No sources document a re-drain after the 2018 refill.
Roman Pool: gold smalti under the tennis courts
The indoor Roman Pool was built 1927–1934 beneath the tennis courts: about 68 by 22 feet, 3.5 to 6 feet deep. It is not marble-lined. Floor to ceiling it wears one-inch square smalti glass mosaic — blue, orange, and clear with fused gold — inspired by the 5th-century Mausoleum of Galla Placidia in Ravenna. The room’s scale and heated-water idea track the Baths of Caracalla (c. 211–217 CE); eight marble statues are copies of ancient Greek and Roman figures. Unlike Neptune, sources do not describe a recent multimillion-dollar rebuild; the pool is kept full, tiles intact.
Can you swim? Tour access and the $1,000 exception
On every standard visit: no swimming, no wading, no body contact with pool or fountain water. Personal photos are fine; tripods and drones are banned; monopods are allowed; flash is OK outdoors at Neptune and forbidden indoors at the Roman Pool. Staged event shoots need a permit.
All guided daytime and evening tours include both pools. After the 60–75-minute guided loop, daytime guests may stay on the hill to walk gardens and pools until closing (exact hilltop close time is not listed in sources; the Visitor Center runs 8 a.m.–5 p.m.). The Roman Pool sits near the end of the route before the bus down. Parking at the Visitor Center is free; there is no separate day-use fee beyond the tour ticket. Private cars do not drive to the castle — every visit includes the 15-minute, 5-mile narrated bus up La Cuesta Encantada.
The only legal swim most outsiders will ever see advertised is a Foundation fundraiser: $1,000 per person, capped at 50 guests, after-hours Neptune access with historic changing rooms, catering, drinks, and a commemorative towel (wetsuits and floaties allowed). 2026 dates cited include July 25 and September 12. Roman Pool swims have happened in the past (e.g. 2019) but the current calendar highlights Neptune.
What a ticket costs in 2026
Daytime mainstays (prices include a $5.50 non-refundable registration fee): Grand Rooms, Upstairs Suites, and Cottages & Kitchen — about 60–70 minutes, $35 adult / $18 child (5–12); under 5 free. Designing the Dream — 75 minutes, $40 / $23. Julia Morgan Tour — 2 hours, $110 (not offered in summer). Art Under the Moonlight — 100 minutes, $50 / $25 (select fall evenings). Evening and Holiday Twilight tours exist; exact adult prices were not listed in the research sources — check hearstcastle.org before you book. Private tours: up to 4 hours, $1,500 for up to 6 people. Reservations open up to 60 days ahead; arrive 15–25 minutes early. Closed Thanksgiving, Christmas, New Year’s. Winter is quieter. Dress in layers — hilltop fog, wind, and sun trade places fast; indoor rooms are not air-conditioned in summer.
Documented fact vs marketed lore
Fact: Morgan designed and engineered the place for 28 years with Hearst. The pools hosted real Hollywood and political guests — Chaplin, Gable, Lombard, Grant, Crawford, Hughes, Churchill among them. The estate is a State Park you tour by bus, not a resort with open swim hours.
Lore to drop: The yacht story that Hearst shot producer Thomas Ince in a jealous rage over Chaplin and Marion Davies is a durable Hollywood myth; autopsy and investigations point to heart failure tied to ulcers, rich food, and Prohibition liquor, not a bullet. Citizen Kane is not a literal biography — Xanadu mixed several estates (including Oheka in New York), and Welles later regretted the film’s damage to Davies’s reputation; she was a successful comedienne with dozens of billed films, not the talentless Susan Alexander caricature. Their long relationship was, by the documentary record, mutual and lasting — she even helped prop up Hearst’s finances in the Depression.
Honest scorecard
Genuinely excellent: Neptune as outdoor classical stage after the $10M save — scale, Vermont marble, imported temple front, free post-tour time to stand and stare. The Roman Pool’s gold smalti room is one of the best interiors on any American estate tour. Solidly good: the standard $35 Grand Rooms (or Upstairs) loop if pools are your goal — both pools are on every tour; linger after the guide finishes. Skip the fantasy: packing a swimsuit for a normal day ticket, or treating Kane’s Xanadu as a floor plan of San Simeon. Book the Foundation swim only if $1,000 for fifty people in the dark is your idea of a bucket list; everyone else should come for marble, mosaic, and the view, not the water on their skin.
