Triathlon events combine swimming, cycling and running in that order with a huge range of events with total distances from under 15 km to over 300 miles! Select your location to find triathlons in your area, read more about the distances below or scroll down for the UK's biggest events.
Find out more about common triathlon event distances below to help find your perfect event!
Featured events are listed below - select a month/region or the map view to see all events.
Swim Bike Run (formerly Go Tri Local) is ideal for people that are brand new to swim, bike and run and looking to take their first steps in a safe and enjoyable environment.
The flat terrain of the Torbay Velodrome offers a range of Duathlon distances, catering to all ages and abilities in a safe, supported and inclusive manner, with a medal and donut at the finish line!
An Olympic format mixed Team Relay Triathlon using the fantastic facilities at Torbay Velopark, professionally chip timed over a traffic-free course, BTF affiliated with a great finishers medal.
A totally traffic free festival of triathlon offering junior, senior and relay options on the English Riviera. Pool swimming along with tarmac cycling and a parkland run, with a great medal.
Test every discipline in this unforgettable triathlon set along the South West Coast. Catch sight of the iconic Portland Bill lighthouse as you cycle around the beautiful Isle of Portland.
Tavistock Triathlon is for all ages and abilities using the amazing Olympic legacy 50m pool at Mount Kelly with quiet rolling roads for the bike and the disused railway line for the run. What a venue!
Stunning riverside venue! Swim in the beautiful River Ouse, cycle through scenic villages and run around Riverside Park in a triathlon or aquabike event of your choice.
This popular weekend of multisport welcomes everyone to a wide range of activities, lively event village, grandstand seating, relay options, youth events plus some exciting new additions!
A choice of multi-sports events including triathlon, relay triathlon and aquabike at a stunning watersports venue with immaculate water quality, scenic routes, a custom designed medal and much more.
Triathlon and swim events at Roadford Lake, offering a range of distances to suit all ability levels in a safe environment, with camping options to enjoy the area after your event.
Challenge yourself to tackle a 100km Centurion this year, a distance made popular by the PTO race series. Ideal if you're training for a 70.3 Half-Iron or taking a step up from Standard Distance Tri.
Take on this multi-activity event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
Bike past historic landmarks, and run beside the Great Feild at Poundbury. As you finish each leg of the course, you’ll get closer to the crowds of people cheering you on at that final stretch.
Take on this multi-activity event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
One of the country’s most popular middle distance swim-bike-run events, delivered by triathletes for triathletes, at the beautiful and iconic Grafham Water.
Take on a multi-activity or distance event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
The successful Dartmouth Triathlon returns with a stunning sea swim, stunning coastal bike route, out and back run including Devon's flattest road, plus chance to camp on the beach!
Whichever distance you choose, this triathlon will not fail to impress. With stunning views of Weymouth nature reserve and a true test of stamina, you'll be beaming with pride at the finish line.
Located at the Stewartby Sailing Club this venue is perfect for triathlon and aquabike and was host to a sold-out GB team qualifier event in 2023, with probably the fastest bike leg in the country!
Previously known as Mount Edgcumbe Triathlon, triathletes and swimmers of all abilities can experience a truly exceptional venue, finishers medal, t-shirt and memorable day out at a fantastic event.
Situated in the renowned Cardiff Bay, this event stands out as a truly memorable city race. The event village and transition area are on Roald Dahl Plass in front of the Wales Millenium Centre.
Start with a great sea swim in warm waters then on to the bikes for a closed road and flat bike leg. Finally there's a run with views of the sea. Torre Abbey Sands has excellent water quality.
Take on this multi-activity event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
Complete your own Odyssey on a journey of self-discovery in the Cambridgeshire countryside featuring a swim in the River Ouse, a scenic ride and a run around the beautiful town of St Neots.
Top 21 must-do triathlon challenges! Based at the beautiful, award-winning Putsborough Sands and sold out again last year, this triathlon takes in some of the South West’s most stunning scenery.
Stunning riverside venue! Swim in the beautiful River Ouse, cycle through scenic villages and run around Riverside Park in a triathlon or aquabike event of your choice.
Take on a multi-activity or distance event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
Awarded the Event of the year (2021) in the Welsh Triathlon Awards, The Craft Snowman is well known as the toughest multi-terrain triathlon and duathlon in the UK. It is not for the faint-hearted.
Take on a multi-activity or distance event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
Stunning riverside venue! Swim in the beautiful River Ouse, cycle through scenic villages and run around Riverside Park in a triathlon or aquabike event of your choice.
ATW is the largest triathlon organiser in the UK and is bringing you the Oundle Triathlon! It doesn’t matter if you are an experienced triathlete or this is your very first attempt at swim-bike-run.
ATW is the largest triathlon organiser in the UK and is bringing you the Oundle Childrens Triathlon! Ideal for all levels including very first attempts at triathlon.
Take on a multi-activity or distance event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
The Long Course Weekend Yorkshire is back for a second year! A huge multi-sport festival in stunning Nidderdale featuring runs, rides, triple-style challenges and junior events too.
Taking THE ROC into the Lake District, this is an opportunity to test your resolve and focus in one of the most inspiring locations in Europe. Face up to the mountain.
Triathlons at Dawlish Warren, a safe and supported environment for sea swimming, with a range of triathlon distances to offer a great challenge in a scenic location.
The Big East and Maldon Triathlon is brought to you by the largest triathlon organiser in the UK! A great experience featuring a tidal river swim.
Scotland, you are immense. ROC Scotland athletes, you are legends! THE ROC takes on the Highlands, from Kinlochleven to the summit of Ben Nevis, the UK’s highest mountain and back.
A totally traffic free festival of triathlon offering both junior and senior distance options on the English Riviera. Pool swimming along with tarmac cycling and a parkland run, with a great medal.
One of the most thrilling triathlons in the country on a super-exciting route with challenging ascents, descents and open roads, narrow in parts. Includes Full Weekend Festival Ticket in the price!
A lake swim, a trail run and a road ride over the course of the festival weekend. Conquer a triathlon challenge over two days. Includes Full Weekend Festival Ticket in the price!
Guides, tips and advice on triathlon events.
From beginner races to ultra challenges, swim-bike-runs are the UK's favourite multi-sport events - these are the triathlons that you need to have on your radar.
Humbling and exhilarating in equal measures, a half Ironman triathlon is an unforgettable experience - following these hard-learned tips will make sure that's for all the right reasons.
This dynamic multi-sport will test your speed and stamina, providing an incredible experience along the way! We've got everything you need for your first swim-bike-run right here.
Select your location for triathlons in your area.
