The driver of a Ford truck was killed in a crash Saturday evening near Bigfork.
The accident occurred near mile marker 2 on Highway 209 at 7:30 p.m., according to the Montana Highway Patrol.
The vehicle was westbound when the driver, a 42-year-old male from Bigfork, lost control and struck a guardrail.
The vehicle rolled over the rail and down an embankment.
The man did not have on a seat belt and was ejected from the vehicle, authorities said.
The passenger, a 22-year-old man from Kalispell, was wearing a seat belt and was transported by ambulance to Kalispell Regional Hospital with minor injuries.
The road was dotted with black ice at the time of the crash, and speed was a factor, authorities said.
It is unknown whether alcohol was a factor in the accident.