The victim was a 66-year-old local man who was walking through the Regent’s Terrace area of the town at around 12.10am on Saturday 27 October 2012.
Regents Terrace is off Skipton Road near to the railway line.
He was approached by a man on a bicycle who then attempted to steal his bank card before assaulting him and running off.
The man suffered injuries to his head, face and body in the incident and was taken to Harrogate District Hospital for treatment. His injuries are not believed to be life threatening.
The offender is described as wearing a dark-coloured bomber jacket is described as white, aged between 20 and 30-years-old with short, brown curly hair.
Harrogate police officers are appealing to anyone who witnessed the incident or knows who is responsible to contact them with information.
Anyone who can help officers with their enquiries is urged to contact North Yorkshire Police on 101 – select option 2 – and ask for Detective Constable Claire Brown or Harrogate CID.
Alternatively, Crimestoppers can be contacted anonymously on 0800 555 111.
Please quote reference number 12120181184 when passing information about this incident.