Cardiff 10K Road Closures: Full List for Race Day 2026

Key Points

• Cardiff will see road closures on Sunday, 6 September 2026, as the Kidney Wales Cardiff 10K takes place.
• The race is due to start at 10am, with rolling road closures expected between 9am and 1pm.
• Restrictions in the Civic Centre will begin at 5am on Saturday, 5 September, to allow the event village to be set up.
• North Road, Castle Street, Cowbridge Road East, Cathedral Road, Westgate Street and St Mary Street are among the main roads affected.
• Cardiff Council has outlined access arrangements for Blackweir, Queen Anne Square and Greyfriars Road.
• Road restrictions in the Civic Centre are due to remain in place until 6pm on race day.

Cardiff (Wales Times) August 24, 2026 — uk/local/cardiff/">Cardiff 10K road closures will affect routes across the city centre and surrounding areas when the Kidney Wales Cardiff 10K takes place on Sunday, 6 September. Thousands of runners are expected to use the streets of the Welsh capital for the event, which is scheduled to begin at 10am. Rolling traffic restrictions are expected to operate from 9am until 1pm, while separate Civic Centre closures will begin the previous day for the race village preparations.

As reported by Nation.Cymru staff, the planned restrictions will cover key approaches to and routes through central Cardiff, including North Road, Castle Street, Cowbridge Road East, Cathedral Road, Westgate Street and St Mary Street. The council has also published arrangements intended to maintain managed access to certain areas during the closures.

When will Cardiff 10K road closures begin?

The main Cardiff 10K road closures are due to be introduced on Sunday, 6 September, with rolling restrictions in operation from 9am until 1pm. The race itself is planned to start at 10am.

However, some restrictions will begin earlier in the Civic Centre. According to Nation.Cymru staff, King Edward VII Avenue, Corbett Road, Museum Avenue, City Hall Road, College Road and Gorsedd Gardens Road will close from 5am on Saturday, 5 September, until 6pm on Sunday, 6 September. The earlier closure period is intended to enable organisers to establish the race village.

Although the rolling closures are expected to be removed by 1pm on the Sunday, the Civic Centre restrictions are planned to remain in place until 6pm. People travelling through central Cardiff during that period may therefore encounter different restrictions depending on their route and the time of travel.

Which Cardiff city-centre roads will close?

As reported by Nation.Cymru staff, North Road will be subject to rolling restrictions from its junction with Colum Road, extending towards Boulevard de Nantes and the A1461. The A1461 is expected to be affected between North Road and Kingsway.

Kingsway, Duke Street and the full length of Castle Street are also included in the planned race-day restrictions. Other central roads listed in the report include Boulevard de Nantes, The Friary, Friary Gardens, Westgate Street, Wood Street, Golate, Guildhall Place, Quay Street, Central Square, Scott Road, Havelock Street and Park Street.

St Mary Street is due to close between Mill Lane and Guildhall Place. High Street will also be affected between Castle Street and Guildhall Place, according to the road closure information reported by Nation.Cymru.

How will roads west of the city centre be affected?

Cowbridge Road East is expected to close at various locations between Castle Street and Kings Road. Cathedral Road will be affected between Cowbridge Road East and Penhill Road, and side roads exiting onto Cathedral Road will also be closed during the restrictions.

Nation.Cymru staff reported that Penhill Road will close to inbound traffic from the junction with Llandaff Road and Cardiff Road. Wellington Street will also be shut to inbound traffic travelling towards the city centre from its junction with Leckwith Road.

The road closure programme additionally includes Tudor Street from the Clare Road junction, Fitzhamon Embankment, Despenser Street, Despenser Lane, Despenser Place, Plantagenet Street, Beauchamp Street, Clare Street, Lower Cathedral Road, Brook Street, Mark Street, Green Street and Coldstream Terrace.

Neville Street will be closed between Cowbridge Road East and Lower Cathedral Road. These restrictions form part of the route management measures linked to the Cardiff 10K rather than permanent changes to the road network.

Which Sophia Gardens and Cathedral Road streets are included?

Roads around Sophia Gardens and the Cathedral Road area are among those scheduled to be affected by the Cardiff 10K road closures.

The streets listed by Nation.Cymru staff include Hamilton Street, Talbot Street, Sophia Close, Sophia Walk, Spine Road, Plasturton Place, Dyfrig Street, Kyveilog Street, Sneyd Street, Dogo Street, Berthwin Street and Teilo Street.

Gileston Road, Meldwin Street, Fairleigh Road, Fields Park Road, Denbigh Street, Fairleigh Court and Heol Wilf Wooller are also included in the reported restrictions. A lane closure is planned on Western Avenue between Excelsior Road and Mill Lane.

The affected roads extend across sections of the race route and its surrounding traffic-management area. The precise impact on vehicle movement will depend on where runners are positioned and when rolling restrictions are introduced or lifted.

What access will remain during the closures?

Cardiff Council has set out access plans for several locations while the race-related restrictions are in place.

Access to Blackweir will be available through Park Place and Corbett Road, according to the information reported by Nation.Cymru staff. Access to Queen Anne Square will be managed through Colum Road and Corbett Road, with vehicles leaving the area via Corbett Road onto Colum Road.

The normal restriction preventing a right turn from Colum Road into Corbett Road will be temporarily lifted to support access to Queen Anne Square. Traffic-management stewards will control vehicle movements at that location.

Greyfriars Road access will be managed between 9am and 6pm at the junction of Boulevard de Nantes and Park Place. The arrangement applies to buses as well as residents and businesses in the surrounding area.

What is the background to the Cardiff 10K road closures?

The Cardiff 10K road closures are being introduced for the Kidney Wales Cardiff 10K, a road-running event due to take place in the Welsh capital on 6 September 2026. The planned route passes through central Cardiff and areas near the Civic Centre, Sophia Gardens and Cathedral Road, requiring temporary traffic controls before and during the event.

The restrictions include both rolling race-day closures and longer Civic Centre closures connected with the setting up and removal of the event village. Cardiff Council’s stated access measures for Blackweir, Queen Anne Square and Greyfriars Road are intended to manage movements in locations affected by the wider traffic plan.

How could the Cardiff 10K closures affect residents and travellers?

Residents, businesses, bus users, drivers and visitors in central Cardiff may face temporary diversions, managed access points and longer journey times on 5 and 6 September. Those travelling through the city centre, the Civic Centre, Cathedral Road, Cowbridge Road East and Sophia Gardens areas may need to account for the scheduled restrictions, particularly between 9am and 1pm on race day.

For participants and spectators, the closures are expected to create space for the race route and event operations. For people requiring vehicle access to Blackweir, Queen Anne Square or Greyfriars Road, the council’s published managed-access arrangements identify the routes and controls expected during the closure period.