From The Valley County Sheriff's Office:
A single vehicle rollover motor vehicle accident occurred on Hinsdale N Road this morning, April 14. One driver died from injuries sustained in the accident.
MHP is investigating the accident scene.
Update: April 15 from the Valley County Sheriff's Office:
The name of driver was Ryan Patrick Conley, 32 years old. He resided in the Hinsdale area and was working as a ranch hand.
Further information will be provided as it becomes available.