Clarence Simons was 31 when he disappeared after a boating accident on Moon Lake in Duchesne County, Utah, on July 29, 1955. He was one of five people in a small aluminum boat whose trawling gear became entangled in the motor, and witnesses said the craft, which had two motors, began circling uncontrollably and then capsized. Two passengers were rescued, but Simons and two others aboard — his sister Ruby Mae Bosen and her husband Calvin Wayne Bosen — were presumed drowned.

Search teams combed the lake, which reaches 115 to 125 feet deep in places, and the area was searched again two years later; no bodies or significant remains were recovered. The case remains unsolved and is treated as a cold case by the Duchesne County Sheriff’s Office.

If anyone has any recollection of Moon Lake in 1955 or information that could help bring clarity to what happened, please share it with the Sheriff’s Office.