Mason James Boulay, 31, disappeared from his home in the Warrendale area of Waltham (near Cedar Street) on the evening of April 25, 2026. He was last seen at home and left behind his wallet, cellphone, and essential medication — items he normally carries — which has raised immediate concern among family and investigators. The Waltham Police Department filed a report on April 28, 2026, and says he may be experiencing a mental health crisis.

Boulay is described as a white male with brown hair and blue eyes, between 6 feet and 6 feet 3 inches tall, weighing about 170 to 175 pounds. At the time he vanished he was wearing a cream-colored sweatshirt and sweatpants, a blue windbreaker, a green Boston Celtics hat, black sneakers, and was carrying a black backpack. No one has reported contact with him since April 25.

If anyone in Waltham or the surrounding area saw Mason on or after April 25, or has information about his whereabouts, please contact the Waltham Police Department.