A teen from Lehi was killed in a rollover at about 11 p.m. Saturday on a dirt road above Tibble Fork Reservoir.
Killed was:- Brennon Tyson, 18, Lehi.
Three others, including the driver, Tammi Beals, 17, Lehi, were flown by helicopter to American Fork Hospital after the truck they were in tipped over and tumbled down the side of a mountain.
Tyson was pronounced dead at the scene. One of the injured passengers got out of the vehicle and walked out to get help, said Lt. Ron Ferndstedt.
A team from the county's search and rescue division was called to extricate the body. The passengers were treated and released from the hospital early Sunday morning.