Authorities say the driver and a passenger left the car abandoned after striking a tree.
They believe the passenger may have been injured during the crash.
Police are working to figure out why they left the scene.
"It appears that it left the road about 60 to 75 feet from the north to where it's at now," said officer Pat Martin with the St. Joseph police department.
Police say speed was a factor in the accident.
No word yet if charges have been filed against the driver.