YERMO - A 21-year-old woman is dead after her quad rolled down a steep embankment during the weekend.

Amanda Simon, of Fullerton, died at Barstow Community Hospital on Saturday morning, the San Bernardino County coroner's office reported.

According to a report from the California Highway Patrol, Simon was thrown from the quad when it rolled and sustained head injuries. The quad kept moving and struck Simon after she had landed, further contributing to her injuries. She was riding in the desert area near Calico Ghost Town, about 600 yards north of Calico Road and 900 yards east of Ghost Town Road in Yermo.

The coroner's report stated that an ambulance transported Simon to BCH, where she died at 11:15 a.m.