A Sturgis man was injured after losing control of the motorcycle he was driving this week in Sherman Township.
Sheriff Mark Lillywhite said deputies were called shortly before 8 p.m. Monday to Shimmel Road, in an area near Storms Road.
Investigators said a 29-year-old man was traveling south on a motorcycle at what appears to be a high rate of speed.
The driver attempted to pass multiple vehicles, at which time another southbound vehicle made a left-hand turn into the entrance to Glen Oaks Community College.
The motorcycle driver left the roadway to avoid a collision and lost control in the ditch.
Authorities said the driver was conscious but showed signs of a head injury. He was airlifted to Bronson Hospital in Kalamazoo for further treatment.
Authorities said speed is a factor and that the motorcyclist was wearing a helmet.