Mark Hall was 34 when he was last seen in San Francisco on August 20, 1993. He left a note for his mother expressing suicidal intentions and specifically indicated plans to jump from the Golden Gate Bridge, which led authorities to believe he may have taken his own life. His body was never recovered and the disappearance remains officially unsolved; his case is listed in NamUs.

At the time he went missing Hall was described as a Caucasian male with brown hair, 5 feet 11 inches tall and about 160 pounds. The note and his last known location on the bridge are central to the uncertainty about his fate; efforts to locate him have not produced significant leads, and his family continues to live with that uncertainty.

If anyone knew Mark, his movements in San Francisco in August 1993, or has information that could help clarify what happened, please share what you know.