November 21, 2026
The Story Behind the Initial Point atop Mount Diablo
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Events
As part of our ongoing commitment to educate, engage, and entertain our community, we sponsor and support a wide range of events throughout all of the Contra Costa County communities.
October 17, 2026
Open House at the History Center in celebration of American Archives Month
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October 18, 2025
Open House at the History Center in celebration of American Archives Month
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January 25, 2025
CCCHS Annual Meeting and Luncheon, Eugene O'Neill: His Life in Contra Costa County
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November 10, 2024
Californio Rancho Fandango! A celebration of Contra Costa Rancho Heritage
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October 19, 2024
Open House at the History Center in celebration of American Archives Month
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January 27, 2024
CCCHS Annual Meeting and Luncheon, Balfour Guthrie. Brentwood. Boxed fruit.
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February 11, 2023
CCCHS Annual Meeting and Luncheon, The History of the Joaquin Moraga Adobe
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