The island of Cozumel, off the eastern coast of Mexico, is the setting for the fourth leg of the FINA 10km Marathon Swimming World Cup taking place on 2 May.
A squad of seven British swimmers will be looking to impress at this second and final stage of qualifying for the 2015 World Championships this summer.
"The challenge will be massive with more pressure on the athletes" - Bernie Dietzig
The first stage of qualifying was in February at the Billiton Aquatic Super Series 10km in Perth, Australia.
Highly competitive races were a fairly tough test but saw both Keri-anne Payne and Dan Fogg rise to the challenge to make the podium.
At the selection process mid-way point, Payne added bronze to her Perth silver at the second leg of the FINA series in Abu Dhabi.
Jack Burnell also impressed with silver, and Loughborough team mate Fogg was less than a second off the medals in fourth.
British Swimming marathon programme lead Bernie Dietzig knows it will be very hard as there is a lot riding on it as "away from the World Championships this will be one of the most competitive races in the year and promises to be very tactical”.
Dietzig added, “the challenge will be massive with more pressure on the athletes as there is so much at stake but I’m confident our athletes will go there to do their best”.
Tom Allen – Swim Swansea
Jack Burnell - National Centre, Loughborough
Alice Dearing – Royal Wolverhampton School
Dan Fogg – National Centre, Loughborough
Caleb Hughes – National Centre, Loughborough
Danielle Huskisson – Stirling Swim
Keri-anne Payne – Warrender