Dennis Police and Fire personnel responded to the scene near Barristers Walk just before 3 p.m. to find the woman had sustained injuries described as life threatening by Dennis Fire Cap. Wayne Conlon.
Conlon said crews immediately called for medflight and were en route to Barnstable Municipal Airport when they were told medflight crews were delayed.
Rescue Crews then brought the victim to Cape Cod Hospital for stabilization before meeting with the medflight crew at the airport.
The Dennis Police Department are investigating the accident.