20/twenty Challenge swimming caps must be worn in the swim for safety reasons.

All team members must reach Clontarf Beach by 10.30 am to participate in the kayak leg.

All team members must leave Chinaman’s Beach by 11.30 am to kayak back to Clontarf. After this time - you will be transported back by boat.

Grand Prix and Classic Division swim legs – each team member needs to complete 4 laps of the 500m swim course. 

Children under the age of 18 years must be accompanied by an adult throughout the course.


All participants are required to walk the course between Shelly Beach and Clontarf Beach for the safety of all people on the pathway.  Please note this is a council regulation and one of the provisions of holding the event.

Participants in the Grand Prix division can only run from Chinamans Beach to the checkpoint at Georges Heights and back. All other parts of the course must be walked. 

Any teams spotted running where not permitted will receive a time penalty of up to 5 minutes.


If a swimmer gets into difficulty they need to raise their arm and our water safety team will come to your assistance.

Life jackets must be secured prior to entering the water for the kayak leg and kayak waiver needs to be signed at Shelly Beach Check-in.

Teams must ‘check-in’ at all Check Points along the course. Check Points are located at North Harbour Reserve, Clontarf Beach, Chinamans Beach, Georges Heights and Stanton Road.

All participants will be sent a text message on Friday 28 April 2023 with the name and phone number of who to contact in case of an emergency during the event.