The iconic Supertri Blenheim Palace arrives in Oxfordshire, 6-7th June 2026. As the UK’s largest triathlon, of over two decades, the swim-bike-run festival is the world’s only triathlon held at a UNESCO World Heritage site. A bucket-list event for the keen triathlete and perfect for newcomers to the sport, with the idyllic lake swim and closed road course. For 2026, the event will also welcome the world’s finest triathletes, as part of the Supertri Pro Series.
Now under new ownership of global short-course triathlon leader, Supertri, this is a race not to be missed, set against the stunning backdrop of the Palace, Great Lake and vast Estate, in Woodstock, OX20 1PY.
Hosted in the birthplace of Sir Winston Churchill, 7,000 amateur swim-bike-runners will enjoy the uniquely British, breathtaking historic grounds for a weekend of firsts and finish line festivities. Seasoned triathletes too, looking for an iconic destination event to truly test themselves.
Entries are filling fast, and for 2026, now’s your chance to lace up on the same course as the world’s best triathletes, as Supertri adds the Pro Series to the weekend event. The elite of British racing, plus world class stars, will take to the start line for the chance to qualify for the Supertri Pro Series Final and a prize pool of $800,000.
Swim the sheltered Palace lake, cycle fully closed roads through the lightning-fast Estate and run past the Palace and across its stunning parkland. From the speedy SuperSprint to the mighty Weekend Warrior, choose from a variety of distances and team relay options:
Saturday 6th June
Sprint: 9.15am. 750m swim / 19.8km bike / 5.4km run. Individual and relay.
SuperSprint: 3.15pm. 400m swim / 13.3km bike / 2.9km run. Individual and relay.
Weekend Warrior: 9am. 750m swim / 19.8km bike / 5.4km run. Individual.
Push your limits with Supertri’s ultimate test of endurance and determination. Complete as many back-to-back triathlons as you can across the weekend and top the leaderboard to be crowned Weekend Warrior.
Sunday 7th June
Sprint: 10.45am. 750m swim / 19.8km bike / 5.4km run. Individual and relay.
SuperSprint: 2pm. 400m swim / 13.3km bike / 2.9km run. Individual, relay and youth (14-15yrs)
Supertri CEO, Michael D’hulst says: “We are proud to add the iconic Blenheim Palace to Supertri’s line up of mass participation events. The integration of elite racing alongside mass participation reflects our ambition to connect the very best in the sport with grassroots, creating a unique festival of triathlon in the heart of Oxfordshire. At Supertri, every finish line matters and we hope to inspire the competitor in everyone this summer.”
For those taking part in their first triathlon this summer, Supertri presents the First Timer Programme, designed to empower new triathletes to confidently complete their first race through structured training and expert guidance. A 12-week, free personalised training plan is presented by TriDot, while live online sessions and exclusive Facebook group access provides FAQs, gear checklists, nutrition basics, race-day guides and more. On race day, first-timers can rack together in the transition zones, take to the first-timers start wave, receive special announcer shout-outs and even ring the first timer bell on the course!
Every participant will receive complimentary bag drop, app tracking and a branded swim hat. Cross the finish line for your race medal, t-shirt, chip timed result and post-race hydration.
Assemble your cheer team, rally family and friends for the ‘early bird’ spectator ticket offer for 20% off Park & Gardens tickets, up to 31st March 2026 (use code: TRI2026). A festival of live music, snacks and drinks awaits the whole family.
Register today for the bucket-list triathlon of 2026 at www.supertri.com
