Sandra Sandy Hopler was 18 and a student at Keystone Junior College when she disappeared after telling her roommate she planned a trip to New York City. She was last seen September 29, 1973, at the Martz Trailway Bus Station in Scranton, Pennsylvania, but never reached New York and has not been seen or heard from since.

At the time she went missing she was described as a white female with light brown hair and hazel eyes. Distinguishing marks included a mole on the back of her right hand between thumb and index finger, a small mole near the left side of her lip, and a small scar in one eyebrow. Her ears were pierced and she wore eyeglasses. On that day she wore a burgundy blazer, a dark blouse, carried a tan shoulder purse and had a new Seiko watch with a gold face.

The Pennsylvania State Police are listed as the investigating agency. Few investigative details have been made public; tips and interviews were followed over the years but none produced a definitive lead and the case remains cold.

If anyone knew Sandy, saw her at the Scranton bus station that day, or has information about her planned travel, please come forward.