Thousands to take part in Supertri Blenheim Palace 2025

Supertri Blenheim Palace will take place in the grounds of the estate on June 6 and 7, offering the world’s only swim-bike-run festival set against the backdrop of a UNESCO World Heritage Site.

More than 7,000 participants are expected to take part across a weekend of racing in the birthplace of Sir Winston Churchill.

Gemma, a mother of eight-year-old twins, will compete in her first triathlon despite a lifelong phobia of water.

Gemma, 41, from Swindon, said: “I want to prove to my twins that you really can do anything you set your mind to.

“What better way to show them strength than by pushing myself outside my comfort zone?”

Her journey to this point has included losing 10 stone and a long IVF journey with her wife before having their twins.

She has signed up through Supertri’s First-Timer Programme, which supports newcomers with 12 weeks of free personalised triathlon training, live online sessions, and First-Timer expert support on race day.

Michael D’hulst, CEO of Supertri, said: “Supertri Blenheim Palace is one of the highlights of the UK triathlon calendar.

“With 50 days to go, we’re excited to welcome athletes of all levels to experience racing in such an incredible setting.

“Entries are selling fast, don’t miss your spot on race day, register now.”