Casto Oaks Wine

6947 hwy 49 north
Mariposa, CA 95338


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Harold and Kris Casto first fell in love with the small Sierra Foothills town of Mariposa in 1991 when they purchased their 160 acre ranch nestled deep in Hunters Valley. During the week they ran their roofing company of nearly 30 years in Mountain View, Ca and on the weekends they continued to work on their ranch. Whether it was feeding livestock, clearing brush, or fetching water from the nearby spring they always found a way to stay busy adapting to the country lifestyle in hopes of someday retiring in Mariposa County. As a chapter was opening in their life, they needed a new challenge and their passion grew for horticulture and enology. So they got to work!

In 2001 Harold and Kris purchased the 6 acre vineyard located a few miles from their Hunters Valley Ranch. Planted and maintained originally by Angus Bullis in 1994 was 6 acres of Zinfandel grapes, a classic varietal for the Sierra Foothills. They started by revamping the entire vineyard with all new irrigation, posts and re-planting vines in some instances. They built the winery shortly thereafter. In 2003 Mount Bullion Vineyard (Casto Oaks) was bonded. In 2005 Harold and Kris officially retired and moved onto the Casto Estate permanently. Joining the Casto Oaks in 2005 was Jason Smith, grandson of Harold and Kris. He would train under Harold for the next few years as well as consulting from Tom Bell, an industry star in his own right. By 2008 Harold handed off the wine making duties to Jason, and they never looked back!

Through the years changes have occured in the vineyard. In 2011 a 1.5 acre section of the Estate Vineyard was grafted to Cabernet. In 2015 they also re-planted an older section of 2 acres to Cabernet as well as Cabernet Franc. The Casto's also added .75 acres of Merlot with 10% field blended Petite Syrah. Through the years Cabernet has become one of their major staples. These varietal additions to the Estate will bring Casto Oaks closer to their vision of crafting world class Bordeaux style Cabernet Blends for years to come. They have not however forgotten their roots which is the Estate Zinfandel they have now produced from the very same vineyard for 14 years. Producing wines year after year from the same vineyards have huge advantages in the vineyard and cellar alike. The production varies from 800 to 1,300 cases annually and American oak barrels are used exclusively.

Harold, Kris and Jason maintain the vines personally each year. Fall is the quiet time for the vineyard when the vines begin to go dormant and autumn leaves drop. Near Thanksgiving a cover crop is seeded consisting of annual clover mixes to ensure soil stability as well as a natural nitrogen source in the spring. The vines are pruned late in the spring to avoid frost from the occasional chilly nights, they shoot thin two times at the least as well as drop fruit in the early stages of verasion. Intense concentration of fruit, acidity and rich color throughout these wines is achieved through these vineyard management practices. Once the clusters are harvested by hand they are then maticulously sorted again before destemming. This is Gold and Wine country!


2015 Estate Zinfandel Port
CA - Sierra Foothills


2013 Gardner Vineyard Reserve Cabernet
CA - Sierra Foothills


2013 Estate Zinfandel
CA - Sierra Foothills


2017 Chardonnay
CA - California


2014 Casto Oaks Man's Best Blend
CA - Sierra Foothills


2014 Syrah
CA - Sierra Foothills


Winery Discount

  • 5%

    on half a case or more.
  • 10%

    on a case or more.
  • 20%

    on two or more cases.

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