Crystal Springs of Napa Valley
Visit Prism with a Private Chauffeur
Estate Cabernet from 25-year-old vines on volcanic soils in the new Crystal Springs of Napa Valley AVA, made by Ashley Hepworth. Prism does not receive visitors; here is what to know, and a day at sought-after estates nearby that do host.
Book a Six-Hour Wine Tour
About the Winery
Prism Vineyards was founded on what it calls a simple, uncompromising promise: to make terroir-driven wine by putting quality first at every decision. The website does not name the owners, but it does name the team. Winemaker Ashley Hepworth spent 15 years as a winemaker at Joseph Phelps Vineyards, and vineyard manager Mark Neal guides the farming.
The estate vineyard is in the Crystal Springs of Napa Valley AVA, approved in November 2024 on the west-facing slopes of the Vaca Range between Mount St. Helena and Soda Springs. Prism's vines are about 25 years old, in volcanic soils above 400 feet. The current wines are 2024 Cabernet Sauvignons, one labeled Napa Valley and one Crystal Springs of Napa Valley, in bottles and magnums.
Prism sells through an allocation on its website, and members earn access to private events and tastings. There is no tasting room, visit page or published address. Since Prism does not host public visits, the day below takes you to three sought-after estates nearby that do, ending at RARECAT, where Ashley Hepworth also consults.
Tasting Fees
Prism does not offer tastings.
Tasting fees as of September 2026. Wineries set and collect their own fees, and they change from time to time.
At a Glance
Location
St. Helena
AVA
Crystal Springs of Napa Valley
Visiting
Prism has no tasting room and does not offer public tours or tastings; allocation members are invited to private events and tastings.
Known For
Crystal Springs of Napa Valley Cabernet Sauvignon
Founded
Founding year not published
Good to Know
Join the allocation through prismvineyards.wine. Members earn access to private events and tastings.
A Suggested Six-Hour Day
Pickup at 10:00 a.m. from a nearby hotel such as Meadowood or Alila Napa Valley.
10:00 · Pickup at Meadowood or Alila Napa Valley
Since Prism does not host visitors, this day takes you to three sought-after estates nearby that do. Meadowood, at the foot of Howell Mountain, is about 10 minutes from the first stop, and Alila Napa Valley in St. Helena about 12 minutes. The day runs about seven hours, and extra time can be added by the hour.
10:15 · Viader Vineyards & Winery
About 10 minutes away. A family estate on the steep, rocky lower slopes of Howell Mountain, also in the Crystal Springs of Napa Valley AVA, home of the Cabernet Franc blend the family calls Liquid Cashmere. The Estate Tasting Experience is $100, three estate-grown red blends after a guided walk with views of the vineyard and caves. By appointment, Thursday to Saturday, 10 a.m. to 4:30 p.m., with a $50 deposit.
11:50 · Merus
About 10 minutes away. A Cabernet that began in a two-car garage, now made at a restored ghost winery tucked into a canyon east of St. Helena, with 7,000 square feet of caves. The Collectors Tasting is $150, a cave tour and a seated tasting of six vintages, about 90 minutes. By appointment only, prepaid on Tock.
1:30 · Lunch at Forum at Meadowood
About 8 minutes away. Lunch at Forum, the main restaurant at Meadowood at the foot of Howell Mountain, with seasonal dishes drawn from the Meadowood farm. Lunch is served on weekdays, with brunch on weekends. Prefer a picnic? We can arrange a catered picnic at a winery that allows one; the cost is quoted when you book.
3:05 · RARECAT Wines
About 20 minutes away. A small, woman-owned winery making wine in Napa Valley, Champagne, Bordeaux and Russian River, with Ashley Hepworth as consulting winemaker. The private seated tasting of five wines with a wine educator is $85, waived for members and with qualifying purchases. By appointment at the Calistoga tasting room.
4:35 · Back to your hotel
Back by about 4:55 p.m., about seven hours after pickup.
About $335 per person in tasting fees for the three wineries, paid directly to each winery.
Viader hosts Thursday to Saturday, and Forum serves lunch on weekdays with brunch on Saturday, so plan this day for Thursday, Friday or Saturday. Back by about 4:55 p.m.
Every tour is custom. This day is a starting point: your chauffeur will shape it around what matters to you, and we plan multi-day tours for guests who want to see more of wine country.
Your Vehicle & Six-Hour Tour Rates
Up to 6 guests
Elite Luxury SUV
Lincoln Navigator or Cadillac Escalade
From $750
Six-hour wine tour, plus 20% gratuity. Additional hours $125 each.
Up to 9 guests
Jet Sprinter or Executive Luxury Van
Captain's chairs and room to spread out
From $1,350
Six-hour wine tour, plus 20% gratuity. Additional hours $225 each.
Larger groups travel in more than one vehicle, and we plan the winery appointments around your group, since many wineries limit groups to 6 to 8 guests. Tasting fees are separate and paid directly to each winery. Every tour starts with six hours; add time by the hour when you book.
Questions
Can you visit Prism Vineyards?
No. Prism has no tasting room and offers no public tours or tastings, as of September 2026; allocation members are invited to private events. We can plan a day at nearby estates that do host.
How can I buy Prism wine?
Through the allocation on prismvineyards.wine.
Who is behind Prism Vineyards?
The website does not name the owners. Winemaker Ashley Hepworth, formerly of Joseph Phelps Vineyards, makes the wines, and Mark Neal manages the vineyard.
Where is Prism Vineyards?
Its estate vineyard is in the Crystal Springs of Napa Valley AVA, on the west-facing slopes of the Vaca Range. Prism does not publish an address.
What is Prism known for?
Estate Cabernet Sauvignon from 25-year-old vines on volcanic soils above 400 feet.
How does booking a tour with Bien Chauffeured work?
Reserve a six-hour tour online, even if your plans are still taking shape. Your chauffeur will email you first to learn what matters to you, then build your itinerary and make the winery appointments. Extra hours can be added.
Reserve Your Tour Now, Plan the Details Later
Your plans don't need to be final to book. Reserve your six-hour tour online, and your chauffeur will email you first to learn what matters to you, then build your itinerary and make the winery appointments. Prefer to talk? Call our concierge at 888-291-2328.
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