On Monday afternoon, emergency responders were called to a golf course in Caledon, Ont., to respond to the crash.
An OPP news release says that a man operating a golf cart "was descending a steep embankment" when the vehicle hit a wall and ended up causing the driver to be ejected.
The 52-year-old driver ended up being airlifted to a Toronto trauma centre.
An adult passenger suffered a minor injury in the same crash.
Anyone with information about the incident is asked to call OPP investigators at 905-584-2241.
Information can also be passed on anonymously through Crime Stoppers at 1-800-222-8477.