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Cardiff Half Marathon 2026: Everything You Need To Know
- 2 days ago
- 10 min read
Looking for a fast autumn half marathon with big crowds, an international field and a course through the heart of a capital city? The Cardiff Half Marathon should certainly be on your list. It has grown into one of Europe's largest half marathons and is now Wales' largest mass participation and multi charity fundraising event.
Cardiff is also one of the six races in the SuperHalfs series, alongside Lisbon, Prague,
Berlin, Copenhagen and Valencia. More than 27,500 registered runners take part alongside world class elite athletes, while the predominantly flat course makes it attractive to everyone from first-time half marathon runners to those chasing a PB. If you're running the Cardiff Half Marathon 2026, here's everything you need to know.
Cardiff
Cardiff is the capital of Wales and a compact city that works particularly well for a major running weekend. The city centre contains a mixture of historic buildings, major sporting venues, shopping areas and parks, while Cardiff Bay adds a very different waterfront area a short distance away.
Cardiff Castle is one of the city's most recognisable landmarks and provides an appropriately dramatic setting for the start of the half marathon. Nearby is the Principality Stadium, the home of Welsh rugby and one of the most distinctive stadiums in the UK. Both feature prominently in the race experience.
Further south, Cardiff Bay is home to the Senedd, Wales Millennium Centre and the Norwegian Church, all of which runners will see during the race. Roath Park and its large lake provide another change of scenery later in the course.
One advantage of Cardiff for runners is that many of its major attractions are relatively close together. That makes it easy to combine the race with a weekend in the Welsh capital, although as always it is sensible to save the serious sightseeing and long periods on your feet until after you've finished.
The Cardiff Half Marathon
The Cardiff Half Marathon has changed enormously since it was founded by Barnardo's in 2003. Around 1,500 runners took part in the first edition, compared with a mass race field of more than 27,500 registered runners today.
It is now one of Europe's largest half marathons and Wales' largest mass participation and multi charity fundraising event. Alongside the mass field, Cardiff attracts high-quality men's, women's and wheelchair elite races and hosts the Welsh Half Marathon Championships each year.
Cardiff has also staged some of the biggest events in international road running. The city hosted the World Half Marathon Championships in 2016 and the Commonwealth Half Marathon Championships in 2018, while the modern race holds an Elite Road Race Label from World Athletics.
Its inclusion in the SuperHalfs has added another international dimension, bringing runners to Wales from across Europe and beyond.
When Is The Cardiff Half Marathon 2026?
The 2026 Cardiff Half Marathon takes place on Sunday 4 October. The wheelchair race is scheduled to begin at 9:50am, followed by the elite runners and the white, green and red start pens at 10:00am. The blue, purple and yellow pens begin from 10:10am.
Early October can provide excellent half marathon conditions, but the weather in Cardiff can be unpredictable. Cool conditions would suit a fast race, while rain or wind could make parts of the course more challenging. Check the forecast during race week and make your final clothing and pacing decisions accordingly.
Is There A Cardiff Half Marathon Expo?
Cardiff works differently from many other major international half marathons because most UK runners do not need to attend an Expo to collect their race number.
Race packs for UK entrants are posted before the event and contain the race number and integrated timing chip. International entrants collect their race packs from the Event Village at Cardiff City Hall Lawns, while runners whose posted pack does not arrive can also arrange to collect a replacement.
The Event Village forms the hub of race weekend and includes the Event Information Desk, charity stands, official merchandise, event partners, food, drink and other runner services. It is also the location of the race-day baggage facility.
Final 2026 race pack collection times will be confirmed by the organisers. International runners and anyone requiring a replacement pack should check the final event information before travelling.
The Cardiff Half Marathon Course
The Cardiff Half Marathon has a predominantly flat course that manages to include many of the Welsh capital's best known landmarks within 13.1 miles.
The route starts outside Cardiff Castle and takes runners past major sporting venues before heading south towards Penarth and Cardiff Bay. After crossing the Cardiff Bay Barrage, runners return through the Bay before heading north towards Roath Park and eventually back into the city centre.
There are a couple of climbs to be aware of, including Penarth Road early in the race and Fairoak Road at around 12 miles, but Cardiff remains a fast half marathon with genuine PB potential.
The Cardiff Castle Start
Starting immediately outside Cardiff Castle gives the race an impressive sense of occasion before you've run a single mile. The castle sits right in the centre of Cardiff and provides one of the defining images of the event. From the start, runners quickly encounter some of the city's major sporting landmarks as the course begins its journey away from the centre. Make sure you're in the correct coloured pen and don't waste energy trying to force your way through runners during the opening stages simply because your first mile is slightly slower than planned.
Past Cardiff's Stadiums
One of the early features of the route is its connection with Cardiff's sporting identity. Runners pass the Principality Stadium, one of the most famous rugby venues in the world, before the course also takes them past Cardiff City Stadium. These early miles are likely to feel exciting and relatively easy, particularly with the atmosphere around the city centre. This is exactly where runners can make the mistake of going too quickly, so settle into your intended pace rather than allowing the occasion to dictate your effort.
Towards Penarth
The route heads away from central Cardiff towards Penarth, taking runners through a very different part of the course. Penarth Road includes one of the more noticeable inclines of the race. It isn't enough to turn Cardiff into a hilly half marathon, but it is worth knowing about if you're targeting a particular time. Maintain a sensible effort rather than trying to force an identical pace uphill. The course then reaches Penarth Marina before heading towards one of the race's most distinctive sections.
Across The Cardiff Bay Barrage
Crossing Cardiff Bay Barrage provides a dramatic change of scenery. After the urban opening miles, runners suddenly have much more open surroundings and views across the water. The barrage connects Penarth with Cardiff Bay and is one of the sections that gives the Cardiff Half its identity. It can also feel more exposed than the city streets, particularly if race day is windy. Rather than worrying about individual mile splits if you're running into a headwind, concentrate on maintaining a consistent effort. There is still plenty of racing ahead once you leave the barrage behind.
Through Cardiff Bay
After crossing the barrage, runners enter Cardiff Bay and pass some of the capital's best known modern landmarks. The route takes you past the Norwegian Church, the Senedd and Wales Millennium Centre. This is one of the most visually interesting sections of the race and provides a strong contrast with both the city centre and the more open barrage.
Cardiff Bay has been extensively redeveloped over recent decades and is now one of the city's main leisure and cultural areas. On race day it also provides one of the sections where runners really get a sense of being on a tour of the Welsh capital rather than simply following a fast road course.
Around Roath Park
Later in the race, the route heads north towards Roath Park, giving runners another significant change of scenery. Roath Park is one of Cardiff's best known green spaces, with the course taking runners around the lake. By this stage you're well into the second half of the race and the early excitement has probably been replaced by the harder work of maintaining your pace.The park provides a useful mental landmark. Once you've completed this section, attention increasingly turns towards the journey back into central Cardiff and the finish.
The Final Miles
The closing stages bring one of the most important challenges on the course. Fairoak Road includes a climb at around 12 miles, which can feel considerably more significant with almost a full half marathon already in your legs. If you've paced the earlier sections sensibly, this is where that restraint can pay off. Don't panic if your pace drops slightly on the climb. Maintain your effort, get over the top and concentrate on the remaining distance.
As you return towards central Cardiff, the crowds and knowledge that the finish is close provide a welcome lift.
The Civic Centre Finish
The race finishes in Cardiff's Civic Centre, providing a grand setting at the end of 13.1 miles.
The crowds build as runners approach the line and the scale of the event becomes particularly apparent in the final stages. After starting beside Cardiff Castle and travelling through the city, Penarth, Cardiff Bay and Roath Park, returning to the heart of Cardiff provides an appropriate conclusion. Whether you're chasing a PB, completing your first half marathon, raising money for charity or collecting another SuperHalfs stamp, take the opportunity to enjoy the final stretch rather than spending the whole time staring at your watch.
Is The Cardiff Half Marathon Fast?
Cardiff is predominantly flat and has established a strong reputation for fast racing, but there are some factors to consider. The huge field can make the opening stages congested, the barrage can be affected by wind and there are a couple of climbs, including one late in the race.
None of those significantly changes Cardiff's credentials as a fast half marathon. With good conditions, sensible pacing and the right training, this is certainly a course where a PB is possible.
Aid Stations
Water and other race nutrition are provided at stations around the course, with toilets also available at drink stations. The exact drinks, nutrition products and station locations can change, so check the final 2026 runner information rather than relying on details from a previous edition.
If you're planning to use gels during the race, practise with them during training. Even when nutrition is available from the organisers, race day isn't the time to experiment with something you've never used before.
Finish time pacers are also available in every start wave, which can be particularly useful if you're targeting a specific finishing time.
What Is The Crowd Support Like?
Cardiff has a strong reputation for crowd support and the compact nature of the city helps create a lively atmosphere around many parts of the course.
Support is particularly noticeable around the city centre and other accessible sections of the route. Charity cheer points also contribute significantly to the atmosphere, reflecting the enormous role fundraising plays in the event.
There may be quieter or more exposed stretches, particularly away from the centre and around the barrage, but the contrast between those sections and the busier parts of Cardiff gives the race some of its character.
The crowds build again towards the finish, helping to make the final run into the Civic Centre one of the highlights of the event.
Cardiff And The SuperHalfs
One of the biggest reasons Cardiff has become increasingly attractive to international runners is its place in the SuperHalfs. The series consists of six major European half marathons in Lisbon, Prague, Berlin, Copenhagen, Cardiff and Valencia. Runners create a free SuperPassport and collect a stamp for each event they complete.
Finish all six and you earn the SuperMedal and become a SuperRunner. The races can be completed in any order and in your own time, allowing runners to create their own European half marathon journey.
If you're taking part in the SuperHalfs, make sure you create your free SuperPassport and include your passport number when registering for Cardiff so your result can be recorded.
Can You Run The Cardiff Half Marathon For Charity?
Absolutely. Charity fundraising is at the heart of the Cardiff Half Marathon and this is one of the most important charity running events in the UK.
Cardiff is Wales' largest multi charity fundraising event, with more than £3 million raised for charities and good causes each year. More than 100 official charities are associated with the race, so charity runners form a significant part of the field.
Charity entries provide guaranteed or reserved race places in return for a fundraising commitment, depending on the individual charity's arrangements. This can be particularly valuable when general entries have sold out.
If you already have your own Cardiff Half Marathon entry, you can also choose to fundraise for a charity without needing another race place. This usually gives runners greater flexibility because the compulsory fundraising target associated with a charity entry may not apply, although you should check directly with your chosen charity.
Charity stands, running vests, fundraising teams and cheer points are visible throughout race weekend, making fundraising much more than a small addition to the Cardiff Half experience.
How Do You Get A Place In The Cardiff Half Marathon 2026?
Demand for Cardiff has grown considerably and the 2026 race introduced a ballot for general entry for the first time after the 2025 event sold out within hours.
The general ballot has now closed. Runners who were unsuccessful still have several potential routes into the 2026 race, including charity places, international tour operator packages and the event's Business Challenge.
Charity entry is likely to be the most relevant option for many runners, although availability varies between organisations and places can sell out. International runners can also look at official tour operators offering race entry as part of travel packages.
Runners who have already purchased an eligible SuperHalfs SuperVoucher, Series Pass or charity space can redeem their Cardiff place using the appropriate access code or token.
The registration deadline for runners obtaining a place through a charity, Business Challenge package or event partner is Tuesday 1 September 2026, so don't leave it until race week to complete your registration.
Our Verdict
Cardiff combines many of the things runners look for in a major half marathon: a predominantly fast course, impressive landmarks, strong crowd support, a city-centre start and finish and the atmosphere that comes with a big field.
It also has an identity that goes beyond simply being a quick 13.1 miles. Starting beside Cardiff Castle, crossing the barrage, running through Cardiff Bay and finishing in the Civic Centre gives the course a genuine connection with the city.
SuperHalfs status has made Cardiff increasingly international, while the enormous charity programme remains one of the event's defining characteristics. Whether you're targeting a PB, running your first half marathon, raising money for a cause that matters to you or working towards the SuperMedal, there is a good reason to have Cardiff on your running list.
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