Toni Stalker, 59, a passenger in a sand rail was killed this weekend in a wreck on Mount Lemmon, officials said.

A Tucson woman died over the weekend as a result of a two-vehicle accident on Mount Lemmon Road.

Toni Stalker, 59, was a passenger in a sand rail driven by a 27-year-old Tucson man. Stalker was wearing her lap belt, but not the full shoulder harness while riding on Mount Lemmon Road near the intersection of Fuego Road in Oracle Saturday afternoon, said Tim Gaffney, spokesman for the Pinal County Sheriff's Office. At about 2:15 p.m. the sand rail and a Ford F350 pickup truck traveling in opposite directions collided head-on as they rounded the corner of the dirt road.

Neither the Tucson driver of the pickup truck nor his 13-year-old son in the passenger seat was injured.

The driver of the sand rail was taken by ambulance to a Tucson hospital for treatment of non-life-threatening injuries.

Stalker was in “extremely critical condition” and air lifted to a Tucson hospital with serious head injuries, Gaffney said. She died the next day after suffering traumatic brain injury.

Investigators did not find any signs that drug or alcohol impairment played a role in the accident.

Senior Editor, News, Arizona Daily Star, Tucson, Az.