SAS: Who Dares Wins
A sea swim off the Isle of Anglesey and a run along the dunes and rocky beaches of Newborough Forest provides just some of the challenge for 1000 athletes in this tough event
With 16,000 runners taking part, and streets lined with supporters, the Brighton Marathon Weekend brings world-class competition and a party atmosphere to the vibrant seaside resort
Some of the world's best triathletes assemble for Challenge Dubai, in the first race of the Triple Crown Series, which sees $1 million go to the man and woman who wins all three events
The world's most scenic ultra-triathlon celebrates its tenth anniversary, as Dylan McNeice fends off a competitive men's field and Gina Crawford aims to regain the title she lost last year
This 100km trail race from Rotorua to Kawerau in New Zealand is part of the Ultra-Trail World Tour, an 11 race series of ultra-marathons that attracts the elite of off-road runners
La Palma is the venue for this 83km ultra marathon, with over 1000 international runners taking on a total of 8500 metres of ascent on the island's spectacular volcanic landscape
Athletes assemble in north Wales for one of the calendar's most challenging triathlons, across stunning Snowdonian mountain scenery and the historic slate quarries of Llanberis
World champion Javier Gomez and chef Gordon Ramsay are among the competitors in this inaugural Ironman in Staffordshire - with a 1.2 mile swim, 56 mile bike ride and half-marathon run
Jenni Falconer has coverage of Britain's second biggest triathlon, as thousands of elites, enthusiasts and celebrities enjoy the course set in the grounds of Winston Churchill's birthplace
This unique triathlon begins with a swim in the River Dee, before taking riders out to the Welsh countryside on the bike, and returning for the run in the ancient city centre
Two thousand athletes amass to take on the most prestigious long course triathlon in the UK, and a crucial qualifier for the Ironman World Championships in Kona
Racing past the iconic sights of the city, Tri Liverpool hosts the second round of the British Triathlon Super Series, the country's premier elite competition
Thirteen thousand triathletes, with elites and celebrities from sport and entertainment, gather for the world's largest triathlon, with the landmarks of London providing an iconic backdrop
This brand new event features one of the fastest courses on the circuit and takes place around the iconic Cardiff Bay, with the start and finish outside the stunning Millennium Centre
The stunning Pembrokeshire coast is the setting for this triathlon, which is made up of three events over three days - the Wales Swim, the Wales Sportive and the Wales Marathon
Nottingham is the venue for this popular and competitive iron-distance triathlon, as 1000 athletes strive to earn the title 'Outlaw' in the world's toughest one day endurance race
Para Tri gives the UK's 12 million disabled people an opportunity to come together, compete and have fun on a dedicated playing field at Dorney Lake, Windsor. Danny Crates and Rob Walker call it.
Iron-distance event, starting with a swim in the waters of Weymouth Bay, the 112 mile bike course takes in the Dorset countryside before a four lap marathon run in Weymouth town centre
Snowdonia hosts the 2015 World Mountain Running Championships, where fitness, bravery, speed and agility are all put to the test in this elite international competition
The final event in the Castle Triathlon Series takes place at Hever Castle in Kent, incorporating elite competition and the world's largest children's triathlon
Kevin Harris and Katharine Merry present this popular event from the historic walled city of York, attracting elite runners and celebrities to its flat and fast course
A freezing loch swim; a bike across the gruelling roads of the Scottish Highlands; a run up and down Britain's highest mountain - only true Bravehearts need apply
A raft of riverbank romps ensues as competitors flock to historic Stockton to take on a variety of obstacles in and around the River Tees, before walking the plank off Captain Cook's ship
Part of the Challenge Triathlon series, a 1.9km swim off Playa Toro, 90km bike on the spectacular switchbacks of the Serra de Tramuntana before a run through the historic city of Paguera
This North Wales winter tri is not for the faint hearted - with a bracing swim in Plas y Brenin's lake, a 69km bike across mountain passes, and a run along the craggy slopes of Moel Siabod
Dean Macey is one of the thousands racing the 10km obstacle course designed to test their endurance, and sense of humour, with mud, ice, tunnels and even a pitch-dark London storm drain
Highlights of the 97km race that climbs from the Atlantic coast to the summit of Teide, Spain's highest mountain. Starting at midnight, runners have 23 hours to complete the epic journey.
Seven day mountain bike stage race across New Zealand's Southern Alps, linking together over 500km of spectacular trails and challenging single-track in a stunning part of the world
A thousand international athletes take on 100km of trail from Rotorua to Kawerau in New Zealand. The spectacular course takes them through some breath-taking scenery.
Katherine Merry presents the UK's flattest, fastest and friendliest marathon, first run in 1908, as thousands of runners aim for the finish at the iconic Emirates Old Trafford Cricket Ground
Thousands of elites and enthusiasts take on the iron-distance course through New Zealand's Southern Alps, with storm conditions making the world's most scenic triathlon even tougher
This tough, thrilling 179km race from Rutland to Melton is reminiscent of the Monuments, attracting top pro teams from home and abroad with its blend of wide roads and dicey farm tracks
Cardiff hosts a spectacular festival of cycling as thousands of riders take part in a mass-ride alongside an elite race. Tough climbs and a city centre finish are the order of the day.
La Palma is the venue for this 83km ultramarathon, with over 1000 international runners taking on a total of 8500 metres of ascent on the island's spectacular volcanic landscape
Enthusiasts and celebrities, including Mel C and Alistair Campbell, take on the iconic course alongside an elite race that includes Alastair Brownlee and European champion India Lee
World Championship qualifying event with 2000 athletes taking on a 1.2 mile swim, 56 mile bike ride and 13.1 mile run in and around the historic Shugborough Estate
Coverage of the 97km race from Tenerife's coast to the summit of Teide - Spain's highest mountain - and back down to the coast: one of trail running's ultimate challenges
The inaugural Swansea Triathlon offers a sprint distance race for elite and age-group athletes, including rugby legend Shane Williams. Aly Vance presents, commentary from Patrick Winterton.
The event that boasts one of the fastest courses on the circuit in and around Cardiff Bay, as the elite race alongside enthusiasts and celebrities such as rugby legend Shane Williams
The streets of the capital provide an iconic backdrop to the action as thousands gather to compete in the world's biggest triathlon. The elite race features World No 2, GB's Jody Stimpson.
Jason Bradbury presents highlights as some of Britain's medal contenders for the Paralympics, including Lauren Steadman and Dave Hill, take on their final race before heading to Rio
Joe Tidy and Annie Emmerson present highlights from Nottingham's iron-distance race as over 1000 athletes of all abilities strive to complete the course and call themselves Outlaw
The opening round of Britain's biggest urban obstacle race takes place at Wembley Stadium. Thousands face mud, tunnels, dizzying climbs, slides and heart-stopping leaps.
A 170km run that takes in 13,500 metres of climbing in just two days, through the Sorteny Valley National Park and the Madriu-Perafita-Claror Valley, an area with world heritage status
Stage race-style tri that takes place over three consecutive days incorporating the Wales Swim, the Wales Sportive and the Wales Marathon all in the Pembrokeshire Coastal National Park
Almost 2000 triathletes from around the world swim and ride through the stunning Basque Country and run through the heart of historic Vitoria, in one of Spain's biggest triathlons
Thousands of triathletes - including some of the world's leading pros, and Welsh rugby legends Shane Williams, Ryan Jones and Ian Gough - swim, ride and run through stunning Pembrokeshire
Trentham Gardens provides the stunning venue for a weekend of triathlon celebrating Stoke on Trent's position as European City of Sport for 2016
Elite runners and celebrities are among the 10,000 competitors racing around York's flat, fast marathon course
Attracting one of the strongest elite fields of the year, this race is fiercely contested due to its flat, fast course. Katharine Merry presents, with commentary from Patrick Winterton.
Caribbean island Aruba is the latest addition to the Challenge calendar, and should attract a top field of elite athletes to its crystal clear waters, rolling hills and white beaches
Competitors swim through the stunning lake at Plas y Brenin, in the shadow of north Wales's beautiful mountains, before taking to the same mountains for a 60km bike race and off-road run
Popular and challenging triathlon across the Isle of Anglesey in North Wales, with 1000 athletes taking on a sea swim and a run across the dunes and rocky beaches of Newborough Forest
This five day, non-stop adventure race sees teams of four tested to the limits 600km across Ireland, including mountain ascents, sea kayaking, massive cycle stages, caving and coasteering
This unique adventure race is a gruelling mix of running and sailing which takes teams of five on a journey up the west coast of Britain, from Wales to Scotland
Stars of the sport, including GB's Jodie Swallow, James McKenzie and James Cunnama, make the trip to Thailand's beautiful tropical island of Laguna Phucket for Asia's premier triathlon.
Seven day mountain bike stage race through New Zealand's Southern Alps. The scenery is stunning, but it's a brutal challenge with over 500km of tough trails and 15,000 metres of climbing.
The world's most scenic tri confronts a strong international field, including local and title holder Dougal Allan, with a testing, long distance course across New Zealand's Southern Alps
First run in 1908, this 26.2 mile race is now the UK's flattest, fastest and friendliest marathon which finishes at the iconic Emirates Old Trafford Cricket Ground
Alistair Brownlee and Javier Gomez are among the star athletes lining up to take part in this exciting rejig of the triathlon format, with a variety of new swim, bike, and run distances
Spectacular martial arts action, including sparring and power-breaking, as Europe's best-of-the-best fight for medals in Liverpool. Jason Bradbury presents, with commentary from Rob Walker.
The stunningly beautiful 26.2 mile route takes competitors across the tropical island of Tobago, from the Caribbean Sea to the Atlantic Ocean
The Swansea Triathlon offers an exciting sprint distance race for elite and age group athletes, and with the action taking place in the city centre, an electric atmosphere is guaranteed
Against the backdrop of Blenheim Palace - the birthplace of Sir Winston Churchill - this iconic triathlon is the traditional season opener and the second biggest UK event
La Palma in the Canaries is the venue for this 74km ultra marathon, with over 1000 runners taking on a total of 4,350 metres of ascent on the island's spectacular volcanic landscape
This prestigious Ironman 70.3 World Championship qualifying event sees 2000 athletes taking on the 1.2 mile swim, 56 mile bike and 13.1 mile run in the scenic Staffordshire countryside
The event returns to Cardiff Bay, with one of the fastest courses on the circuit, attracting both enthusiasts and elites, including Adam Bowden and Olympian Beth Potter
Cardiff hosts a truly spectacular festival of cycling, including a closed-road sportive and UCI pro race with a challenging route of tough climbs in some of Wales' most dramatic scenery.
The world's biggest triathlon sees 13,000 triathletes, including some famous faces, tackle this fast course through the capital. Plus, there's a quality elite race in the mix.
Treading the line between beautiful and brutal, this 97km race climbs from the Atlantic to Teide's summit, Spain's highest mountain, allowing runners just 23 hours to complete the course
In this grueling mountain bike adventure, competitors must complete the 200km course, including 6500m of climbing on the slopes of the 'Stone Giant', Mount Penyagolosa, in just 17 hours
Stirling is the venue as teams take on three days of physical and mental challenges, ranging from running and canoeing to anagrams and riddles, testing core skills of both body and mind
Triathlon reimagined as a stage race. This three day Pembrokeshire event comprises Wales Swim, Wales Sportive and Wales Marathon which, once completed, add up to an iron-distance triathlon.
A 170km running event in the Pyrannees, in which competitors must scale 13,500m of climbing, over 1.5 times the height of Everest, across technical and demanding terrain in just two days
One thousand athletes toe the line of Nottingham's competitive iron-distance triathlon, hoping to earn the title Outlaw. Presented by Joe Tidy, and Patrick Winterton provides commentary.
Fastest Known Time race to the summit of China's YuZhu Peak, 6,178m above sea level. Risks include altitude sickness, storms, sub-zero temperatures and the use of crampons on icy terrain.
Two thousand competitors from all over the world flock to the provincial park of Landa to take on this picturesque triathlon in and around 2012's European Green Capital
This Ironman World Champs qualifier tests competitors to the max with a 2.4 mile sea swim, a big climbing 112 miles bike through beautifully brutal Pembrokeshire before the marathon finish
The European City of Sport hosts a weekend of triathlon that is truly an event for all with elite, age group and children's races in stunning Trentham Gardens
This fast and flat race in the historic walled city of York, attracts international interest in both the men's and women's elite races. GB's Jo Zakrzewski and Ross Houston both feature.
Rachel Stringer presents a weekend-long festival of triathlon that includes everything from sprint to the gruelling half-iron distance Gauntlet race and the world's largest kids' triathlon
Highlights from the leading global obstacle race series as Europe's best assemble to face a series of brutal challenges for the coveted European Championship title
Top pros flock to the stunning Caribbean island of Aruba for part of the Challenge series of triathlons which includes age group and junior events ensuring there's something for everyone
Following the action as elite off-road triathletes swim, bike and run their way across the most beautiful and challenging multisport terrain in six locations across Europe
As part of the 4 Deserts Race Series, athletes battle against the elements and each other in Mongolia's Gobi March and the Atacama Crossing, Chile in this mental and physical trail trial
Runners take on the highest and most extreme race courses in the world, including the Devil's Ridge in Scotland and Mount Olympus in Greece. Plus, events in Italy and Madeira.
The world's strongest AR teams face a 600km race on foot, bike and kayak, unsupported and without sleep in the remote Atlay province of northern China, bordering Kazakhstan and Mongolia