**Swansea Half Marathon 2025: Key Road Closures to Know as Thousands Prepare to Run**
The city of Swansea is gearing up for its iconic Half Marathon this coming weekend, with a record-breaking number of participants expected for what organisers have dubbed the city’s largest running celebration yet. The summer event, scheduled for Sunday, 8 June, will see the return of the popular race alongside additional shorter runs, transforming Swansea into a hub of community spirit, athletic challenge and logistical planning.
Starting at the distinguished Swansea Arena, runners will embark on a route that weaves through the city’s landmarks, reflecting both its rich heritage and vibrant present. The course initially takes competitors westwards, leading them towards Singleton where the path splits at Swansea University. Entrants participating in the 5-mile event will turn towards Blackpill, circling near Clyne before tracing the promenade back to the arena.
For those tackling the headline half marathon distance, the route offers a scenic and historic tour. Runners will pass through university grounds, wind past Brangwyn Hall and the remains of the city’s ancient castle, navigating a course that also threads past the National Waterfront Museum. From here, the path sweeps out towards Mumbles, a stretch that has become synonymous with picturesque coastal running, before runners loop back for a dramatic finish along Brynmill Lane towards Swansea Arena.
To ensure both the safety of all involved and the smooth delivery of the event, Swansea Council has announced a comprehensive schedule of road closures. These measures are crucial for safeguarding thousands of runners and spectators but will require motorists and residents to plan ahead.
Major arterial routes such as Oystermouth Road (A4067), Quay Parade, Victoria Road, and the length of Mumbles Road will be affected at various points throughout the morning and early afternoon. Some closures will come into effect as early as Saturday evening, with the westbound carriageway of Oystermouth Road shutting from 8pm on Saturday, 7 June, remaining inaccessible until 3pm the next day.
On Sunday morning, extensive closures will commence from 8:15am, with key city centre roads such as Oxford Street, Castle Bailey Street, St David’s Place, and the Kingsway among those that will be inaccessible to traffic. The closures extend well beyond the city centre, with access restrictions in and out of residential roads lining the race’s route—particularly in the areas around Mumbles and Mayals Road—lasting until approximately 12:30pm.
Motorists are being advised to avoid non-essential journeys into the city during these times, as diversions and altered traffic flows will be in operation. Parking restrictions will also be enforced, especially on St Helens Road and Castle Street, starting from 9pm on Saturday through to late Sunday morning.
In addition to the scheduled outright closures, there will be a series of temporary restrictions including prohibitions on turns at several junctions—such as no right turns from Mayals Road onto Mumbles Road, and from a number of local roads adjoining the raceway. Where possible, access will be maintained for residents, though authorities warn this may only be feasible when it is deemed safe and practical by marshals and officials.
With the Half Marathon now in its eleventh year, anticipation is high, and organisers have expressed gratitude to local residents and businesses for their continued cooperation. The event, which consistently draws thousands of competitors, is not just a test of physical endurance but also a testament to Swansea’s civic pride and community cohesion.
Residents seeking updates and further information on specific road closures or travel advice are encouraged to consult the official Swansea Council website or to register for event notifications. In the interests of minimising disruption, those travelling within or through Swansea on the morning of Sunday, 8 June, are strongly urged to check their routes in advance and factor in extra travel time.
As the city comes together to support runners and celebrate a shared commitment to health and charity, patience and planning are expected to ensure that the day goes off with minimal disruption and maximum enjoyment for all. The Swansea Half Marathon remains a highlight of the city calendar, drawing in athletes, volunteers, and supporters from across Wales and beyond.