Emergency crews were called to the scene of a crash on Highway 1A east of Exshaw at around 3 p.m. Saturday.
EMS said they found a man critically injured, believed to be in his 60s.
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Witnesses on scene told EMS that he was operating a motorcycle when it lost control, ejecting him into an adjacent ditch.
He was the lone occupant on the motorcycle.
The man was flown by STARS Air Ambulance to the Foothills Medical Centre in life-threatening condition.