Maria Guadalupe Serrano was 28 and a mother of two when she disappeared from Half Moon Bay, California. She was last seen on October 17, 1998, leaving her home on Cypress Street in the afternoon to walk to a client’s house on Purissima Street, where she worked as a housekeeper, but she never arrived and has not been heard from since.

Her disappearance happened during Half Moon Bay’s annual Pumpkin Festival. Originally from Mexico, Serrano spoke only Spanish and regularly sent money home to support her children, who later emigrated to the U.S. The case began with the Half Moon Bay Police Department and was later transferred to the San Mateo County Sheriff’s Office after the local department was dissolved. Despite years of searching, no significant clues have emerged and the case remains unsolved.

If anyone knew Maria, saw her on October 17, 1998, or has information about her whereabouts, please come forward.