An Albuquerque, N.M., man died after a pickup in which he was a passenger rolled over Tuesday about 23 miles north of Craig on Colorado Highway 13.
Mack Holliday, 51, of Albuquerque died after he was ejected from the vehicle.
Two other people who were in the vehicle were also taken by ambulance to The Memorial Hospital, but officers from the Colorado State Patrol didn't know their names or where they lived.
Officers also could not immediately verify who was driving the vehicle as of presstime.
The vehicle had New Mexico license plates.
The 1999 Chevy pickup was traveling north when it traveled off the right side of the road and tumbled 313 feet down the embankment.
The pickup rolled 2 1/2 times and landed facing the opposite direction, said Sgt. Gary Meirose of the Colorado State Patrol.
An initial investigation suggested that the driver was wearing a seatbelt but the passengers weren't, Meirose said.
Police are investigating the possibilty of alcohol use at the time of the accident.
"We're looking into it," Meirose said. "We don't know if alcohol was involved."