Hunter Craig Hall was killed in the crash Friday morning in the Clyde Creek area.
Wasatch County sheriff's officials say Hall and another 12-year-old boy were riding the same four-wheeler on a gravel road when the Hall lost control on a turn and rolled the vehicle. He was pinned under the ATV.
Hall was pronounced dead at the scene, while the other boy was taken to Heber Valley Medical Center for treatment.
Officials say both boys were wearing helmets.
Deputies urge families to wear protective gear and drive cautiously while operating four-wheelers.
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