The cyclist, a 15-year-old local girl, suffered serious injuries when she collided with a blue Audi estate car at the crossroads of Knaresborough Road, Hungate and Moor Road at around 6pm on Thursday 3 July 2014.
The girl, who was riding a silver and white bike, was airlifted to Leeds General Infirmary, where she is currently being treated for her injuries.
The driver of the car, which was travelling along Knaresborough Road towards Ripon, was uninjured in the collision.
The road was closed for over four hours while officers conducted their investigations into the collision.
Officers are appealing to anyone who witnessed the collision or saw either the Audi or the cyclist – who was wearing a distinctive pink top – 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 Traffic Constable Andy MacLeod or Harrogate Roads Policing Group.
Please quote reference number 12140109240 when passing information about this incident.