Peggy Lynn Alt was 17 when she was last seen at her family home in High Ridge, Missouri, on March 2, 1985, two days before her eighteenth birthday. She may have gone by her middle name Lynn.

Reports indicate Peggy apparently packed belongings and left the residence, but it has never been established whether she left alone or with someone else. No confirmed contact followed, and major missing-person databases list her as endangered missing and note that foul play or enticement is suspected. Her case appears in NamUs as MP9849 and in NCMEC files.

Who knew Peggy back in High Ridge or has any information about her movements after March 2, 1985?