The Lake County Sheriff's Office said officers were dispatched to a field on West Winchester Road after the hikers found a car wreck with a victim inside.
Officers found a gold 2010 Toyota Prius crashed into a tree, police said. According to police, a white male victim was dead in the driver's seat.
Investigators said the car appeared to be traveling eastbound until it veered into the field and hit the tree.
The incident remains under investigation.