2018 Map of Cordelia

Elevated terrain features like Elkhorn Peak and Sulphur Springs Mtn define the central geography, separating the urbanized southern sectors from the canyons to the north. Water features such as Terminal Reservoir and the marshy Cordelia Slough illustrate the region's managed water systems and coastal drainage patterns. The boundary between Solano and Napa counties traverses the rugged highlands, highlighting the transition from suburban centers to the open spaces of Jameson Canyon and Sky Valley.