Barbara Diane Rosemark was 26 and working as a physician intern when she disappeared from Sacramento on December 22, 1983. She finished a shift at UC Davis Medical Center around 3:00 PM that day but never returned to work and has not been seen or heard from since.

About a month later, on January 25, 1984, her brown 1973 Ford Maverick was found abandoned near Greyhound Rock off Highway 1 in Davenport. The car appeared to have been sitting there for weeks. Barbara frequently spent weekends in Santa Cruz where her boyfriend lived, so investigators considered the possibility she had headed to that area before she vanished.

No further clues have been reported and the case remains unsolved. If anyone knew Barbara, saw her car, or was in the Santa Cruz–Davenport area in December 1983, please share what might help bring closure.