All you need to know about the Cardiff Half
Tens of thousands of runners will take part in the Cardiff Half Marathon on Sunday morning.
Widespread road closures will be in place to accommodate the 13.1 mile (21km) route, which begins in the city centre.
Cardiff council said the city would be "exceptionally busy" and advised residents and visitors to plan ahead.
Transport for Wales (TfW) is providing additional train services to bring runners and spectators into the capital ahead of the race, but some other rail routes will be disrupted due to engineering works.
"This is our biggest year ever with over 29,000 people registered to take part across the weekend," said Matt Newman, chief executive of Run4Wales.
What time is the Cardiff Half Marathon?
The race start-time is staggered, with the wheelchair race beginning at 09:50 BST.
Runners in the elite, white, green and red pens begin at 10:00, while runners in the yellow and blue pens begin at 10:10.
What is the Cardiff Half Marathon route?
The race begins on Castle Street, continuing past the Principality Stadium and Cardiff City Stadium to Penarth.
The runners then cross the barrage back to Cardiff Bay, before looping around Roath Park Lake and finishing in the civic centre.
Cardiff Half Marathon road closures
There is an extensive set of road closures in place across Cardiff.
Closed until 00:00 on 7 October:
College Road from the junction with Museum Avenue to the junction with King Edward VII Avenue
Edward VII Avenue to the junction with Boulevard de Nantes and to the junction with City Hall Road
Closed 10:45 on 7 October:
North Road from its junction with Colum Road to its junction with Boulevard de Nantes
Closed between 04:00 and 12:00 on 6 October:
North Road south of the junction with Boulevard de Nantes to the junction with the A4161
The A4161 from the junction with North Road to its junction with Kingsway
Kingsway from the junction with the A4161 to the junction with Duke Street
Duke Street and Castle Street
Cowbridge Road East from the junction with Castle Street to the junction with Cathedral Road
Closed between 10:00 and 15:10 on 6 October:
Colum Road
Park Place from the junction with St Andrews Place to the junction with Colum Road
Closed between 08:30 and 15:10 on 6 October:
Cowbridge Road East from the junction with Cathedral Road to the junction with Neville Street
Wellington Street, Leckwith Road and Sloper Road
Penarth Road, Cardiff Bay Barrage, Harbour Drive and Roald Dahl Plas
Britannia Quay, Pierhead Street, Bute Place, Lloyd George Avenue
Herbert Street, Tyndall Street, East Tyndall Street and Windsor Road
Adam Street, Fitzalan Place going across Newport Road
West Grove, Richmond Road and Albany Road
Marlborough Road, Blenheim Road, Pen-Y-Lan Road and Ninian Road
Fairoak Road, Lake Road East and Lake Road West
Fairoak Road, Cathays Terrace, Corbett Road and Museum Avenue
More information, including access arrangements for residents, can be found on the Cardiff council website.
What about trains, buses and parking?
TfW will be running additional early morning trains to help runners and spectators get into Cardiff in time for the race.
People travelling from Swansea, Hereford, Maesteg, Gloucester, Ebbw Vale, Barry Island, Penarth, Radyr and Rhymney will be able to catch a train bringing them into the city centre before 09:00.
Engineering works have closed the lines between Treherbert, Aberdare, Merthyr Tydfil and Radyr, but there will be rail replacement buses to connect with trains at Radyr.
Engineering works are also taking place on the Vale of Glamorgan line, but TfW said customers from Llantwit Major and Rhoose could use a replacement bus to Barry or Bridgend stations.
For those looking to drive, there is a park and ride facility at Cardiff City Stadium, which will be in operation between 07:00 and 18:00 on Sunday.
Cardiff Bus is also running a number of buses into the city centre ahead of the race start time, which are outlined on its website.
Where can I watch the Cardiff Half Marathon?
Race organisers provide a number of "spectator zones" at various points along the route for the thousands who turn out to watch the race in person.
These zones are on Castle Street, Corbett Road and King Edward VII Avenue, where the runners cross the finish line.
You can also watch the highlights from the half marathon on BBC iPlayer and S4C, from 20:00 on 7 October.
Can I walk the Cardiff Half Marathon?
Runners are told they must complete the 13.1 mile race in 4.5 hours, which is around the average walking pace.
If runners fall behind the required pace to finish in this time, a sweep vehicle will collect them.
Run4Wales said those who wish to continue after the race has ended should do so on the pavement, as roads re-open, and do so at their own risk.
Can I wear headphones in the Cardiff Half Marathon?
Race organisers have said runners should avoid wearing headphones during the race to limit the risk of injury to themselves and others.
