One motocross rider has died after colliding head-on at speed with another rider on a dark shingle road, after they had left a party in North Canterbury last night.
Neither man was wearing a helmet and the bikes had no lights on them, police said.
The crash happened in a remote rural area on Cascade Road, Balmoral, near Culverden about 9.45pm.
The man who died was 21-year-old Craig Gordon Pickering, a dairy farmer from Balmoral, police said.
Both motorcyclists were flown to Christchurch Hospital by the Westpac Rescue Helicopter, but Mr Pickering died on the way.