The San Diego Association of Geologists (SDAG) presents the second edition of "Geology and Enology of the Temecula Valley." A lot of hard work went into finishing this book and putting on a socially-distant field trip in 2020. Temecula Valley has become a very successful wine-producing region, as its ideal combination of well-drained soils and unique microclimate has been noticed. SDAG returned to the area on the 20th anniversary of their first trip to produce an updated and expanded collection of self-guided road logs and articles to interest and inform the experienced geologist, casual traveller, and wine enthusiast. Temecula Valley has changed a lot in the last 20 years and editor Luke Weidman is excited to share some of the highlights.