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Grimsey's Marathon Coaching

About Trent Grimsey

Your premier Marathon Swimming Coach! Dive into a world of endurance, technique, and passion for the open water. Whether you're a seasoned swimmer looking to refine your skills or a newcomer eager to explore the exhilarating realm of marathon swimming, Trent is here to guide you every stroke of the way. Join us to discover training programs, expert tips, and inspiring stories that will help you reach your swimming goals. Let's make waves together!

Swimming Career

- Australian Swim Team Member (2006 to 2012)

​- Five time Australian Open Water Swimming Champion

- English Channel World Record Holder (2012)

- Capri to Napoli World Record Holder (2012, Italy)

- World Championship Silver Medalist (2009, Italy)

- FINA Grand Prix Marathon Swimming Champion (2012)

- Three time King of the Sea Champion (2008, 2009 & 2011, Brazil)

- International Marathon Swimming Hall of Fame Inductee (2018)

- Australian Marathon Swimming Hall of Fame Inductee (2020)

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Coaching Career

​Between 2015 and 2021 coached and mentioned over 50 successful English Channel solo swimmers from around the world. Many who went on to complete 'Oceans 7' and 'Triple Crowns'.​ 

Business Career

Founded Grimsey's Aquatics in 2019, managing aquatic facilities in North Queensland. Managing eight facilities and employing over 70 staff.

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Our Services

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1

One on One Coaching

Using our stepping stone approach, our programs are process driven with measurable results. Easy to follow and understand.

Requirements:

- Time frame required before crossing/event is a minimum of 12 months.

- Must be 100% committed

Includes:

- Detailed training program (easy to follow and understand)​​

- Each individual swim session (consisting of warm up, main set and swim down)

- Specific drills to improve stroke efficiency

- Stepping stone approach

- Measurable results to track progress

- Product recommendations

- Weekly phone/skype calls

- Unlimited emails

- Advice on cold water conditioning

- Advice on adapting to different conditions and scenarios

- Advice on dry-land and flexibility

Investment:

$600 AUD per month

2

Swim Camps

Located in Woolgoolga (recently awarded the best beach on mainland Australia in 2025). Situated halfway between Brisbane and Sydney. These camps are specifically designed for anyone wanting to take part in an open water swimming marathon. We'll be conducting several camps each year.

Requirements:

- Must have completed the appropriate training to undertake such camp

Includes:

- Water safety

- Four day camp

- Exposure to night swimming

- Exposure to swimming next to a boat

- Exposure to swimming in different conditions

- Different swim courses

- Qualifying swim

- Nutritional advice

- Swim advice and recommendations

​Investment:

$1,000 AUD per swimmer

3

Qualifying Swims

It's a prerequisite for many marathon swims to have completed an offical qualifying swim before the event. These are either a set distance or set number of hours. We can supervise and facilitate your qualifying swim.

Requirements:

- Must have completed the appropriate training to undertake such swim.

Includes:

- Water safety

- Swim course

- Swim certification

- Post swim advice and recommendations

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Investment:

When being conducted in Woolgoolga $140 AUD per hour

When being conducted in another location - price on request.

Ideal for swimmers wanting to take part in any of the following:

Australian Marathon Swims

  • Rottnest Channel Swim, Cottesloe Beach, Perth, to Rottnest Island in Western Australia, 19.7kms

  • Derwent River Big Marathon Swim, Derwent River in Tasmania, 34kms

  • Port to Pub Marathon Swim, North Fremantle to Rottnest Island, Western Australia 25km

  • Palm Beach to Shelly Beach Marathon Swim, Palm Beach in Sydney’s Northern Beaches to Shelly Beach, Manly, 27kms

  • Swim Around Keppel, Great Keppel Island in The Keppels, Queensland, 20kms

  • Swim the Gold Coast, Coolangatta Beach to Surfers Paradise, 21.5kms​

Triple Crown

  • The English Channel: between England and France, 33kms

  • The Catalina Channel: between Santa Catalina Island and Los Angeles, 32.3kms

  • Swim Around Manhattan: circumnavigation of Manhattan Island, New York City, 46kms

Ocean Sevens

Contact Us

Ignite the extraordinary within you - this is step one!

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