Triathlon stars Alistair and Jonny Brownlee have outlined a testing course at Fountains Abbey and Studley Royal for their inaugural event in September.
More than 700 entrants have signed up to tackle the course with a third having never competed in a triathlon before.
The brothers founded the triathlon at the National Trust site to build on the Olympic legacy and inspire people into trying out their sport.
The Brownlee Tri will take place on September 21 and cover the shortest, Super Sprint, distance.
Competitors will start with a 400m swim in the Studley Royal lake before cycling 10km around the medieval deer park.
The triathlon will finish with a 2.5km run through the Studley Royal water garden and Fountains Abbey’s ruins.
The brothers said they chose a short distance to involve all abilities.
Alistair, the Olympic champion, said: “We wanted somewhere that was fairly local, somewhere that you could hold a triathlon that was beautiful and inspiring. It had to be somewhere nice and iconic.”
Jonny said the course would offer a challenge to competitors.
He added: “Our cycling knowledge around here helped us plan the course. “We’ve been on all the roads out here so we know which roads have hills in them. It has a couple of short, sharp hills in it. But it’s a nice course.”
The brothers will go head to head in a ‘Brownlee Challenge’ during the day and London 2012 bronze medallist Jonny said the super sprint would play in his favour.
“I’m sure I will try and out sprint him at the end,” he said.