5th September 2026: The City of Derry Triathlon Countdown is on!
Race a Triathlon National Series event on one of the country’s most iconic riverfront courses. Fast, scenic, and supported by an incredible festival atmosphere.
For many athletes, this is the moment the season moves from planning to becoming reality. And if the City of Derry Triathlon isn’t yet on your radar this year, now is the time to take a closer look.
Why Race City of Derry Triathlon?
- Fast, scenic city-centre course
- Closed-road bike course through the city and into county Donegal
- 750m tidal River Foyle swim
- 5km riverside run finishing in Ebrington Square
- Electric atmosphere with International Elite, Age-Group, and Triathlon National Series athletes
About the City of Derry Triathlon
On Saturday 5th September athletes from across the island of Ireland and beyond will line up along the banks of the River Foyle for a standout weekend of racing.
And as one of the final events in the 2026 Triathlon Ireland National Series, this is a race not to be missed.
Last held in 2017, The City of Derry Triathlon will also host a European Triathlon Cup – attracting a strong, competitive field, including international Elite athletes.
Age-Group competitors will have the chance to earn Triathlon National Series points.
City of Derry Triathlon & Aquabike – Age Group Races
As part of the Triathlon National Series, the City of Derry Triathlon will host the second to last race in the 2026 Series.
With up to 500 Athletes taking part – this is a race not to be missed!
Whether you’re chasing Triathlon National Series points, preparing for Pontevedra, or targeting a late-season PB, the City of Derry Triathlon delivers a race experience that matters.
Course maps
Sprint Triathlon
The official swim, bike, and run course maps along this spectator friendly course will be available soon.
- Swim 750m in the fast flowing, tidal River Foyle
- Bike 20km Closed Road bike circuit crossing the counties of Derry and Donegal
- Run 5km scenic riverside route including iconic landmarks including the famed walled City and Peace Bridge with a finish in Ebrington Square.
A key stop in the Triathlon National Series Calendar
A Triathlon National Series event, the City of Derry Triathlon offers athletes the chance to race for valuable late series points.
For Age Group Athletes, the race forms a fantastic opportunity to race against the best in their field and for those heading to the World Championships in Pontevedra, a great warm up!
Competitive Fields
Why athletes are locking in the City of Derry Triathlon
The City of Derry Triathlon delivers:
- A fast flowing river course, closed road cycle route and a city-centre course that rewards strong racing and spectator lined streets
- A competitive Triathlon National Series Age Group field
- A professional, well-organised race experience from North West Triathlon Club
- The opportunity to share the race weekend experience with elite and high-performance athletes
- Family focused with Kids Fun Run and Triathlon Taster Session on Friday 4th and Waterside Half Marathon on Sunday 6th.
Enter Now
This September the City of Derry will be ready to welcome hundreds of athletes from across Ireland and the world.
The question is will you be at the start line? Don’t miss your chance to be part of this iconic race. Book today!
discover more about the City of Derry Triathlon
In our latest article we look at seven key reasons why triathletes from home and abroad are choosing to race at the City of Derry Triathlon. From iconic landmarks, to convenient location and a challenging course. Read more here.
Kids Fun Run and Triathlon Taster
The weekend also includes:
- Kids Triathlon Taster Session & Fun Run on Friday 4th September
- Family activities & festival atmosphere
- Waterside Half Marathon on Sunday 6th September