Neptune 2027

June 26-27

The Ultimate Open Water Swim Challenge

Join swimmers from around the world in an unparalleled endurance event designed to push your physical and mental limits. Whether you're a seasoned athlete or a passionate open-water enthusiast, this challenge offers an extraordinary opportunity to test your resilience and determination. Swim 1.5 km every hour for your chosen duration — 42, 30, 24, 12, or 6 hours — and experience a unique aquatic adventure inspired by backyard ultra challenges.
Race Information

Swim 1.5 km every hour for as many hours as you dare. Every hour you swim two rounds of 750 m on the clearly marked swim course.

Choose your challenge
42 hours of backyard swimming: Swim for 42 hours and earn glory of a life time. This is truly one of the world's toughest challenges.

Included in the price for the 42 hour challenge is: race cap, finisher T-shirt, Neptune cup and access to an awesome event.

30 hours of backyard swimming: You must complete all 30 hours in order to complete the challenge.

Included in the price for the 30 hour challenge is: race cap, finisher T-shirt, Neptune cup and access to an awesome event.

24 hours of backyard swimming: You must complete all 24 hours in order to complete the challenge.

Included in the price for the 24 hours challenge is: race cap, finisher T-shirt, Neptune cup and access to an awesome event.

12 hours of backyard swimming: You must complete all 12 hours in order to complete the challenge.

Included in the price for the 12 hours challenge is: race cap, finisher T-shirt, Neptune cup and access to an awesome event.

The use of fins and snorkel is authorized during this challenge.

6 hours of backyard swimming: You must complete all 6 hours in order to complete the challenge.

Included in the price for the 6 hours challenge is: race cap, finisher T-shirt, Neptune cup and access to an awesome event.

The use of fins and snorkel is authorized during this challenge.

Start times
All challenges end on Sunday at 18.00. This results in following start times

42 hours: Saturday at 00.00 AM
30 hours: Saturday at 12.00 PM
24hours: Saturday at 18.00 PM
12 hours: Sunday at 06.00 AM
6 hours: Sunday at 12.00 PM

Safety

Safety is our top priority.

Lifeguards will be on-site throughout the event to ensure everyone’s well-being. The organizers will also bring first Aid equipment.

Swimming zones are clearly marked for optimal visibility, and and with beacons in the night.

Swimmers can find shelter from the sun in big tents in the starting area.

What to bring

Swimmers shall bring own swimming equipment, shelter and nutrition.

Swimmers are encourages to bring tent, inflatable madras, all energy products for the whole swim, water can, blankets and warm clothes (in case of cooling). Also eqiupment for boiling water is a good idea.

The use of electronic devices such as GPS watches is allowed. Bring power supply for own use (ie power banks).

During night swim the use of LED light inside the swim bouy is mandatory due to safety concerns.

Fins and snorkel is authorized only for the 12 hour and 6 hour challenge.

Accommodation

You can set up your own tent at the venue, which is safe. The venue will be gated. Storage of valuables is at each swimmers own risk.

Very close to the venue toilets and drinking water is available.

Hydration and Nutrition

Staying fueled and hydrated is the key to success.

Swimmers must bring all nutrition for the whole swim. Water stations can be found close by the venue.

The organizers will have small deposits of energy procucts which is primarily for safety use.

Electronic timing

Swimmers wear a timing chip. At every crossing of the finish line individual lap times will be taken. You receive your lap time from a big screen near the water as you exit the water. And before you reach your tent the lap time will be online for you to watch and for people elsewhere.

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