Darrel B. Nichols was 17 when he disappeared from Park City, Utah on April 1, 1973. He was last seen in the hills around Park City, possibly with friends, and never returned home. Darrel was described as 5 feet 9 inches, 160–165 pounds, with brown hair and brown eyes, and wore horn-rimmed glasses at the time.

Family reported him missing after he failed to come back and searches produced no significant leads. Investigators have not determined whether foul play or an accident was involved; the case is classified as endangered missing and remains a cold case under active investigation.

Anyone who knew Darrel, was in the Park City hills that day, or has information that could help investigators is asked to contact the Park City Police Department.