Site information:

4590 Tesla Rd at S Livermore Ave, 2 mi SE of Livermore

Plaque and site located on private grounds, with limited hours of operation for visitors.

37.66678,-121.73965

Plaque information:

State plaque

Plaque text:

Concannon Vineyard

Here, in 1883, James Concannon founded the Concannon Vineyard. The quality it achieved in sacramental and commercial wines helped establish Livermore Valley as one of America's select wine-growing districts. Grape cuttings from this vineyard were introduced to Mexico between 1889 and 1904 for the improvement of its commercial viticulture.

Plaque placed by California State Park Commission in cooperation with the Livermore Chamber of Commerce and Las Positas Parlor No.96, Native Sons of the Golden West. August 16, 1958.

Registered 4/28/1958