Police are appealing for information after a man was seriously injured in a collision between a car and a motorcycle on the A217 at Gatton Bottom on Friday evening, 3 August 2018.
The incident happened around 7.50pm.
The injured man, in his 20s, was riding the motorcycle. No one else was hurt.
Reigate Hill was closed from Raglan Road up to the roundabout for several hours while police carried out their investigations.
Anyone with information or dashcam footage is being asked to call Surrey Police on 101 quoting PR/P18186200.