Organisers of the Westpac Life Saver Rescue Helicopter inaugural Ballina to Byron Bay Charity Walk were hoping 200 walkers would register for the event.
But in a remarkable community response, a spokesperson says nearly 500 participants have nominated to take on the challenging walk.
Due to the overwhelming response, the event is now at capacity and event organisers have had to close the registrations before the advertised closing date.
Westpac Life Saver Rescue Helicopter has thanked the community for their show of support for the event, which will take place on May 20.