Historical clue formulations

• County next to Napa — 2026-02-14
• Wine valley in the Bay Area — 2025-05-17
• Napa neighbor — 2025-02-01
• California wine valley — 2024-02-25
• California winemaking county — 2023-05-19
• California county north of Marin — 2021-03-10
• California wine region — 2019-05-14
• California wine valley — 2017-02-08
• California wine region — 2015-11-08
• Its seat is Santa Rosa — 2014-02-15
• County northwest of San Francisco — 2011-11-20
• County next to Napa — 2010-09-23
• California wine county — 2010-04-19
• California wine valley — 2007-01-23
• California winemaking county — 2005-03-22
• California wine town — 2002-02-21
• California wine region — 1998-11-25