A 32-year-old man has died in a quad bike crash on Mckinlay Road, Herbert last night.

A passer-by discovered the scene and alerted police and emergency services.

Major Crash detectives attended to investigate the single vehicle crash scene just after 9pm.

Initial investigations indicate the man has failed to negotiate a bend, colliding with a guard rail and rolled the bike. The rider was not wearing a helmet.

Police will now prepare a report for the Coroner.