This geologic map database consists of new geologic mapping, at a 1:24,000 scale, along the southern part of the Bartlett Springs Fault Zone in the northern Coast Ranges, California. The geologic map (published as Scientific Investigations Map 3514) covers an area of 258 square miles in Lake, Napa, Colusa, and Yolo Counties; work, which was undertaken between 2016 and 2021, was supported by the USGS National Cooperative Geologic Mapping Program. This geodatabase contains the most up-to-date and highest resolution mapping in the region. Results and observations reported here help elucidate the geologic deformational history of the area, as well as the relation between older and active structures. Please consult the accompanying pamphlet and the Description of Map Units (in the pamphlet) for a detailed presentation and interpretation of data and discussion of results. The report contains the pamphlet and two map sheets that include the geologic map, a Correlation of Map Units, four geologic-structure cross sections, six microseismicity cross sections, and a microseismicity fault map.