Petaluma Gap · Sonoma County
Visit Ultramarine with a Private Chauffeur
Michael Cruse's single-vineyard California sparkling wine, made in Petaluma and sold by mailing list, visited by private request, and a suggested six-hour day of tasting around it.
Book a Six-Hour Wine Tour
About the Winery
Michael Cruse studied molecular biology at UC Berkeley and worked in research labs before turning to wine, training in winery labs and then opening a custom crush winery in Petaluma. He and friends began trying to make sparkling wine in 2008. After two unsuccessful backyard vintages, he approached grower Charlie Heintz around 2010 for fruit from the Heintz Vineyard.
Ultramarine makes single-vineyard, single-vintage sparkling wine by hand from top sites along the California coast. The first commercial release, in 2014, was the 2010 vintage from Heintz Vineyard, which remains its core wine, and later bottlings have come from Hirsch, Michael Mara and Keefer Ranch. Cruse also makes still and sparkling wines under his Cruse Wine Co. label at the same Petaluma winery.
Ultramarine has no public tasting room and sells its wines through a mailing list, and the wine writer Alder Yarrow of Vinography has called it California's first cult sparkling wine. A visit to the winery is by private request only; we arrange it on your behalf when the winery can host.
Tasting Fees
Ultramarine does not publish a tasting fee or visitor program.
Tasting fees as of September 2026. Wineries set and collect their own fees, and they change from time to time.
At a Glance
Location
1240 Holm Road, Suite B, Petaluma
AVA
Petaluma Gap
Visiting
No public tasting room. Visits are by private request only, and we arrange it on your behalf.
Known For
Single-vineyard, single-vintage California sparkling wine, led by Heintz Vineyard
Founded
First vintage 2010 (released 2014)
Good to Know
The winery is a working production space in an industrial park on Holm Road. Wines are sold through the mailing list, which you can join on the winery's website.
A Suggested Six-Hour Day
Pickup at 10:00 a.m. from a Petaluma hotel such as Hotel Petaluma or the Sheraton Sonoma Wine Country Petaluma.
10:00 · Pickup at Hotel Petaluma or Sheraton Sonoma Wine Country Petaluma
Hotel Petaluma, a restored 1923 hotel downtown, and the Sheraton Sonoma Wine Country Petaluma, overlooking the Petaluma River marina, are each about 15 minutes from the Ultramarine winery on Holm Road. The day below fits a six-hour tour, and extra time can be added by the hour.
10:15 · Ultramarine
A visit by private request at the Petaluma winery, arranged when the winery can host.
11:30 · Koch Family Vineyards
About 15 minutes away. Kevin and Tuesday Koch's family farm and winery on Adobe Road, with gardens, farm animals and sheep that graze between the vines, and a new tasting room for its small-batch Sonoma County wines. The winery does not publish a tasting fee. Open Wednesday to Sunday, 11 a.m. to 7 p.m.
1:00 · Lunch at the girl & the fig
About 30 minutes away. French country cooking on the Sonoma Plaza, with a Rhône-focused wine list, cheese and charcuterie, and a garden patio. Open from 11:30 a.m. on weekdays and 10 a.m. on weekends. Prefer a picnic? We can arrange a catered picnic at a winery that allows one; the cost is quoted when you book.
2:10 · Bedrock Wine Co.
About 5 minutes away. Morgan Twain-Peterson's acclaimed old-vine winery, founded in 2007, pouring in General Joseph Hooker's 1850s house off the Sonoma Plaza. The Bedrock Heritage Tasting is $45, waived with a three-bottle purchase per taster. By appointment only, daily, with the last appointment at 3:30 p.m.
3:10 · Back to your hotel
Back in Petaluma by 3:50 p.m., within six hours of pickup.
Three wineries is the right pace for a day of serious tasting. Ultramarine visits depend on the winery's schedule, and Koch is open Wednesday to Sunday, so we confirm the day when we book.
About $45 per person for Bedrock, plus the Koch tasting fee and any Ultramarine fee, confirmed when we book, each paid directly to the winery.
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 I visit Ultramarine?
There is no public tasting room. Visits are by private request only, and we arrange it on your behalf when the winery can host. When you book a tour with us, your chauffeur makes the reservation for you.
How much is a tasting at Ultramarine?
Ultramarine does not publish a tasting fee or visitor program, as of September 2026.
Who makes Ultramarine?
Michael Cruse, who also makes the Cruse Wine Co. wines at the same winery in Petaluma.
How can I buy Ultramarine?
Through the winery's mailing list, which you can join on its website.
What is Ultramarine known for?
Single-vineyard, single-vintage sparkling wine from coastal California vineyards, above all Heintz Vineyard, first released in 2014 from the 2010 vintage.
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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