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Six Sigma Ranch

  • Owner
    Kaj and Else Ahlmann
  • Address
    13372 Spruce Grove Rd.
  • Address2
    N / A
  • City
    Lower Lake
  • County
  • Zip
  • email
  • Phone
  • Directions

    From the city of Napa drive north on CA-29 for approximately 49 miles.  Turn right on Spruce Grove Rd and follow for 5.5 miles.  Turn right onto Six Sigma Ranch and follow the driveway for 2 miles before reaching the tasting room on the left.

  • Hours
    Open daily 11:00am to 4:30pm
  • Primary Ag Business
    • cattle ranch
    • Other (please explain below)
  • Primary Ag Business--Other


  • Farm or ranch acreage
  • Activities

    We are located 2.5 hours north of San Francisco in beautiful Lake County.  Come taste our wines while relaxing under majestic oak trees at our historic tasting room. Feeling adventuresome?  Schedule a special ranch/vineyard tour in our all-terrain Pinzgauer vehicle, take a hike, bird watch, or simply enjoy a picnic under the oaks.

  • Products

    We sell wine, beef, pork and lamb.

  • Events

    Private Barrel Tastings
    We'll take you onto the crush pad so you can tour our outdoor winery then into our hillside cave to taste our wines in-the-making -- straight from the barrel.

    Vineyard Tours
    Explore the ranch in our all-terrain Pinzgauer!  Learn about the soils and climates that make Six Sigma Ranch unique.  The tour includes a visit to our high-elevation vineyard site we call the Diamond Mine. Visitors who purchase a tour receive a 10% discount on wine purchases. 

  • Accommodations
    N / A
  • Direct Agricultural Sales
    • agriculture-related gifts/crafts
    • on-farm sales
    • wine tasting
  • Educational Experience
    • agricultural technical tours
    • farm tours
    • participatory experience
    • school or youth tours
    • vineyard tours
    • winery tours
  • Entertainment
    • picnic or play area
    • special events
  • Outdoor Recreation
    • bird watching
    • nature walks
    • photography
    • wildlife viewing
  • Miscellaneous
    N / A