It occurred at 1.40pm on Wednesday 13 August 2014, on Follifoot Lane, involving a cyclist and a pedestrian.
There were no other vehicles involved.
At the time in the incident the cyclist, a 77-year-old man from Leeds, was heading from the A658 towards Kirkby Overblow.
He was taken to Leeds General Infirmary by air ambulance where he sadly died a short time later.
Polcie are not yet in a position to release his identity.
The pedestrian, a 72-year-old man from Harrogate, was taken to Harrogate District Hospital where he was treated before being released.
Traffic Sergeant Paul Cording, of the Force’s Roads Policing Group, said: If you have any information which could help my enquiries I urge you to contact the police straight away.
Anyone who can assist with this investigation should contact Harrogate police on 101, select option 2 and ask for Paul Cording.
Alternatively, information can be emailed to email@example.com
Please quote reference number 12140137141.