An 18-year-old man was killed when the car he was driving crossed the centre line and smashed head on into a semi-tanker truck.
The crash happened just before 6 p.m. MT Tuesday in the 7700 block of Highway 8 southwest.
The 34-year-old driver of the semi was not hurt but was shaken, according to police.
Police said neither speed nor alcohol were a factor.
The highway was closed for hours Tuesday night as police investigated.