The 2022 Coast to Coast sold out in just under five minutes after entries opened at midday on Monday.
1000 entries were snapped up, with nearly another 1000 hopefuls now on a wait-list.
Entries for the events' major category, the Longest Day, saw the most entrants in its history since being introduced in 1987, with over 300 people entering to take on the gruelling 243km course in one day.
Race director Glen Currie said it was a great turnaround from seven years ago, when Trojan Holdings purchased the event with just 460 entries in total.