The Castle Gate mine disaster occurred on March 8, 1924, in a coal mine near the town of Castle Gate, Utah (now dismantled), located approximately 90 miles (140 km) southeast of Salt Lake City. All of the 171 men working in the mine were killed in the series of three violent explosions. One worker, the leader of the rescue crew, died from carbon monoxide inhalation while attempting to reach the victims shortly after the explosion.

The explosions were determined to have been caused by a failure to properly dampen coal dust in the mine during the previous shift. The first blast occurred between 8:00 a.m. and 8:15 a.m. in a chamber approximately 7,000 feet (2,100 m) from the entrance to the Utah Fuel Company's Castle Gate Mine #2. A fire boss in this chamber was investigating gas near the roof of the mine when his carbide lamp went out. The miner attempted to relight his lamp with a match that ignited the gas and coal dust, setting off a gigantic explosion.