Seventeen people are being treated for injuries after two vehicles ploughed into a crowd during a car meet-up in Stevenage.
Video of the crash shows one car pull out onto the road and clip a second vehicle, sending both cars into a crowd of people lining the highway.
Organiser Rix Sidhu said the crash was “horrific” and had brought the charity event organised by the Cruise-Herts club to a permanent end.
“Nobody wanted this, we try so hard to make sure this doesn't happen, we beg people not to race on the roads - if they want to race, there are places they can go for that, tracks where they can go at speed,” he said.
“We've decided we're not going to run these any more. After 17 years, it's over.”
Mr Sidhu said participants are urged to stay within the law, but that drivers are often tempted onto the roads in search of social media attention.
“This incident means we are all going to be tarred with the same brush. People will say we are boy racers,” he said.
A Hertfordshire police spokesman said investigations are ongoing, and no arrests have been made.
Police have asked witnesses to send footage of the crash to detectives.
Meanwhile, West Midlands police have promised to prosecute anyone involved in a street race in Birmingham last weekend.
On Sunday, police moved in to disrupt a 100-strong group of drivers and spectators taking part in the cruise.
Traffic police and officers from the Operational Support Unit and drone pilots moved in to disrupt the group that had gathered on the A38 between Minworth and Bassetts Pole.
Chief Superintendent Steve Graham said: “We understand the impact that this type of anti-social activity has upon our communities, not to mention the danger it presents to participants and spectators.
“We are determined to continue these operations to send a message to those involved that we will not tolerate this behaviour and those who continue to drive dangerously or participate will be brought before the courts."