The Hanningfield Triathlon is takes place in the beautiful surroundings of Hanningfield Reservoir, and is organised by Essex & Suffolk Water in support of the charity WaterAid, which is helping to bring clean drinking water, safe sanitation and hygiene education to people around the world.
All available places for the Triathlon have been taken, with participants choosing between sprint or standard distance, or teaming up with friends or family to form a relay team and compete together.
The cycling and running routes take place in the glorious countryside around the Essex Wildlife Trust visitor centre at Hanningfield and Essex & Suffolk Water′s Cafe on the Water. The swim is a challenging open water course in the actual reservoir - the only time of the year this is allowed due to safety considerations.
Among the participants will be leading fitness and body confidence influencer, Healthier Leila, who has been posting regular updates on her training for the event to her 10,200 followers on Instagram (@healthier_leila)
Event organiser and Essex & Suffolk Water Project Engineer, Steve Cottis said: "We′re all really looking forward to this year′s Hanningfield Triathlon, and it′s fantastic that all the available places have been taken.
"It′s great that so many people are taking this unique opportunity to test their endurance in the beautiful surroundings of Hanningfield, all while raising money for WaterAid.
Christine Mellor, Water Industry Partnerships Manager, WaterAid, said: "It′s fantastic that Essex & Suffolk Water is holding the Hanningfield Triathlon to raise money for WaterAid once again.
The positive changes that follow for communities with access to water and sanitation, are incredible.
These basic resources can transform lives and for the first time, people can see a better future for themselves and for their children."
"WaterAid is delighted to have such incredible support and I′d like to thank all of those who′re energetically taking the plunge this weekend."
The Blackwater Tri Club, from Maldon, will once again be providing assistance with equipment and volunteers to marshal the course.
Essex & Suffolk Water would like to remind everyone that swimming in Hanningfield Reservoir can be dangerous and is not permitted, except under careful supervision at events such as the triathlon.
For more information about safety at reservoirs see https://www.eswater.co.uk/your-home/learn-about-water/water-safety.aspx