Lower Lake, CA · $
We have one simple goal in mind for producing our wines: To share the story of the season, the place, and the people who made them. Our story is in every single bottle of Six Sigma wine. We take a natural approach to winemaking as well as farming. Working with Six Sigma methods allows us to take a hands-off philosophy, as we only manage the parameters that are critical to the quality of our wines. Our tasting room is open daily from 11am - 4:30pm for wine tasting. We have a selection of charcuterie items and boards available for picnics. Grills are also available so you can BBQ and try our ranch-raised beef while you are here! Tours of our Diamond Mine Vineyard are available on Saturdays at 10am, Noon, and 2pm! Hiking and biking trails are open daily from 9am-4pm. Please check in at the tasting room before you head out! Join us at Six Sigma Ranch and Winery for an unforgettable experience!
“The sauv blanc was so delicious and Craig was such a fun and knowledge host! Be sure to check out the pig and goats.”
“I showed up on December 23rd, 2025, on a cold and rainy day for a 4pm tasting and they close at 4:30pm. It was my friend's birthday and Christine welcomed us in and pulled stools up to the tasting bar and we had such a wonderful time!!! The owner visited also and it was his son's birthday also! All around such a wonderful place to have a tasting! They stayed open much later than 4:30pm and they were all so nice! Great great tasting! Great wines! I really love their rose and sparkling! Very special!”
“First visit was on their paella night. It was a special treat! Staff was great! Wine is wonderful. The ranch is a must-see!”
“I really enjoyed this winery. Everyone was so friendly, attentive , and professional. The wine was fantastic. The winery tour around the property was so fun, and we were able to learn about the property and history of the area. Andrew our tour guide was phenomenal, and extremely knowledgeable. Our 4 year old daughter enjoyed the ride and, loved the farm animals!”
“We have been wine club members here for over a year now. It is a huge ranch with a small family feel as it is family owned & operated. There is plenty of room there for our kids to play. Definitely a great winery to bring friends and family. We recently went to their international Tempranillo day celebration & was a fantastic time. The wine maker explained each wine that paired with the meals in a fun manner. This wine club is a keeper for us as it has a lot to offer with its membership & the wines are excellent.”
13372 Spruce Grove Road, Lower Lake, CA 95457, US
Open in MapsWebsite
sixsigmaranch.comNever miss a table
Watch Six Sigma Ranch and Wineryand we'll alert you.
