Russian River Valley · Sonoma County
Visit Cosa Obra with a Private Chauffeur
A small Santa Rosa winery making Pinot Noir, Sauvignon Blanc and rosé from small Sonoma County growers since 2008, open by appointment, and a suggested six-hour day of tasting around it.
Book a Six-Hour Wine Tour
About the Winery
Cosa Obra is the winery of owner and proprietor Gregory Hayes, who makes the wines with consulting winemaker Kent Humphrey. The name joins two Spanish words: cosa, a thing, and obra, a hand-crafted body of work. In the winery's own words, this is our thing, this is what we do.
Since 2008 Cosa Obra has bought from small, carefully chosen Sonoma County vineyards: Atoosa's, Greywacke and Windsor Oaks in the Russian River Valley, Dry Stack in Bennett Valley, Fallenleaf in Sonoma Valley, Hummingbird Hill on the Sonoma Coast, Ray Teldeschi in Dry Creek Valley and Sangiacomo in Carneros. It makes Sauvignon Blanc, Pinot Noir, Chardonnay, rosé of Pinot Noir and a proprietary red blend, with current releases of Sauvignon Blanc, Sonoma Coast Pinot Noir and Sonoma County rosé.
The winery is not open to the public. Tours and tastings are by appointment only at its working winery on Hopper Avenue in north Santa Rosa, which makes it an easy, personal first stop of the day.
Tasting Fees
Tasting fees to be verified upon reservation.
Tasting fees as of September 2026. Wineries set and collect their own fees, and they change from time to time.
At a Glance
Location
1160B Hopper Avenue, Santa Rosa
AVA
Russian River Valley
Visiting
Not open to the public. Tours and tastings are by appointment only at the winery, 1160B Hopper Avenue.
Known For
Pinot Noir, Sauvignon Blanc and rosé of Pinot Noir from small Sonoma County vineyards
Founded
2008
Good to Know
Appointments are made through the winery's contact page. Group size, age and pet policies are not published; we confirm them when booking.
A Suggested Six-Hour Day
Pickup at 10:00 a.m. from a Santa Rosa hotel such as Vinarosa or Hotel E.
10:00 · Pickup at Vinarosa or Hotel E
Vinarosa, set among 92 acres of vineyards in Santa Rosa, is about 5 minutes from Cosa Obra, and Hotel E, a restored 1906 Beaux-Arts landmark on the square in downtown Santa Rosa, about 10. The day below fits a six-hour tour, and extra time can be added by the hour.
10:15 · Cosa Obra Wines
A tour and tasting by appointment, about an hour; the fee is confirmed when we book.
11:55 · Harper's Rest
About 40 minutes away. The former Arista estate on Westside Road, bought in 2025 by Chris and Piper Underwood, where a 19th-century hops farmer rests among the vines under an old California bay laurel. The Estate Expressions Tasting of four estate Chardonnays and Pinot Noirs from several vintages, with views to Mount St. Helena, is a $30 deposit and runs 60 to 90 minutes. Open daily 10 a.m. to 4 p.m. in summer, Wednesday to Sunday from November to April; reservations encouraged, leashed dogs welcome.
1:15 · Lunch at Bravas Bar de Tapas
About 20 minutes away. James Beard finalists Mark and Terri Stark's tapas bar on Center Street, steps from the Healdsburg plaza, with paella, Spanish wines and tables indoors or outside. Open daily from 11:30 a.m. Prefer a picnic? We can arrange a catered picnic at a winery that allows one; the cost is quoted when you book.
2:20 · LIOCO Wine Co.
About 5 minutes away. Matt and Sara Licklider's winery, conceived in 2005 in the alley behind Spago Beverly Hills, buying from small family vineyards across California. The tasting room on the corner of the Healdsburg plaza feels like a European wine bar, with records spinning on a vintage Marantz turntable. Tastings are $40 to $60; the Elevated Tasting Experience of library and large-format wines in the private lounge is $60, or $75 with bites. Open daily noon to 7 p.m.; reservations strongly encouraged.
3:20 · Back to your hotel
Back in Santa Rosa by 3:50 p.m., within six hours of pickup.
Three wineries is the right pace for a day of serious tasting. The long middle leg takes you from Santa Rosa out Westside Road. From November to April Harper's Rest hosts Wednesday to Sunday, so in those months this day works Wednesday to Sunday.
About $70 to $90 per person at Harper's Rest and LIOCO, paid directly to each winery; the Cosa Obra tasting fee is to be verified upon reservation.
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 Cosa Obra?
Yes, by appointment only. The winery is not open to the public, but it offers tours and tastings by appointment at 1160B Hopper Avenue in Santa Rosa. When you book a tour with us, your chauffeur makes the reservation for you.
How much is a tasting at Cosa Obra?
Cosa Obra does not publish a tasting fee, so tasting fees are to be verified upon reservation.
Who owns Cosa Obra?
Owner and proprietor Gregory Hayes, who makes the wines with consulting winemaker Kent Humphrey.
What does Cosa Obra mean?
Cosa means a thing and obra a hand-crafted body of work: in the winery's words, this is our thing, this is what we do.
Where do the grapes come from?
Small Sonoma County growers, among them Greywacke and Windsor Oaks in the Russian River Valley, Dry Stack in Bennett Valley and Sangiacomo in Carneros.
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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