The annual Belfast City Marathon has begun with thousands of runners aiming to complete the 26.2-mile course.
The 44th marathon started at Stormont at about 09:00 BST.
Almost 24,000 people signed up for the race, which will pass landmarks including City Hall and Parliament Buildings, before finishing in Ormeau Park.
There will be numerous roads closed and changes to public transport for much of Sunday while the event takes place.
When time does the Belfast marathon start/likely to finish?
The race got under way at the Stormont estate in east Belfast.
The wheelchair race started at 08:59 BST, the elite race started a minute later and all other participants started at 09:01.
Participants started on Prince of Wales Avenue, and are proceeding down the hill, on to the Upper Newtownards Road.
The first of the runners are expected to cross the finish line shortly after 11:00.
However, the rest of the runners will still be making their way across the city for a number of hours after that.
Roads will reopen after six hours, and organisers have asked anyone continuing along the route after that time to move onto the footpath and follow road safety laws.
The Team Relay consists of five legs, of varying distance, with changeover points across the route.
The first Belfast City Marathon was held on the same date in 1982, with more than 3,000 participants starting at the former Maysfield Leisure Centre near the city centre.
Tilahun Nigussie broke the record at the 43rd Belfast City Marathon in 2025. The Ethiopian won the marathon with a new event record of 2:13:37.
The view from the starting line
At the scene: Bernie Allen, BBC News NI
It’s slightly grey and dull weatherwise here at Stormont – but there is plenty of cheer and chat amongst the crowd, as thousands gather at the starting point.
As public transport has been affected in the city because of the race, there was some disruption on the roads leading to Stormont.
As well as those competing, many have lined the sidewalk to cheer on family and friends taking part.
Some have made banners and are holding supportive messages.
As well as solo runners there are plenty of relay race competitors, with many costumes on display.
Some participants are running the marathon in memory of loved ones or in order to raise money for charities close to their hearts.
“I’m running for the Irish heart Foundation,” Stephen Perry told BBC News NI.
“My mother-in-law and best friend died from heart complications.
“It would have been my friend’s 40th birthday today.”
What is the Belfast Marathon route?
The course traverses the city, starting off in Stormont in east Belfast then heading south.
It takes in the Boucher Road, before going west onto the Falls Road.
From there, it’s north, past the Waterworks, as well as through the city centre, before ending in Ormeau Park.
The route has minor alterations in east Belfast this year.
It will now turn left off Beersbridge Road onto Clara Street, and then left again onto Castlereagh Road.
In north Belfast, this year the route will remain on Oldpark Road and turn right at the roundabout onto Cliftonville Road and continuing on the route.
Which roads are closed for the Belfast Marathon?
For a full list of what roads are closed and when they reopen you can click here.
There will be some disruption for the duration of the marathon, with the Upper Newtownards Road closing at the Comber Road junction from about 06:00 until 11:00.
Roads along the route will open and close on a staggered basis as runners pass, so for example the Boucher Road, from Tates Avenue to Stockmans Lane, will be closed between 08:30 and 13:30 while Duncairn Gardens in north Belfast will be closed between 09:30 and 14:45.
The last road to reopen will be the Ravenhill Road from the Rosetta Roundabout to the Ormeau Embankment (where local access is being maintained) which closes at 09:00 and does not reopen until 15:45.
Is there extra public transport?
To help people going to the marathon there will be special early morning trains from Londonderry, Larne, Bangor, and Newry to Belfast Lanyon Place.
For a list of all special departure times click here.
These additional services cannot be booked in advance and standard fares will apply.
Public transport around the city will be affected due to several road closures.
Ulsterbus, Metro and Glider bus services within Belfast will be subject to delay or disruption.
Shuttle buses will be available from Belfast City Hall and Lanyon Place Station to the starting line from 07:00 BST and 07:30 BST respectively.
A shuttle bus will also take spectators from Massey Avenue to Ormeau Park after the start of the race at Stormont and additional buses will drop off runners off at their designated relay changeover point.
A bus will transport participants from Ormeau Embankment to Belfast City Centre from 11:45 BST to 16:00 BST and every shuttle bus leaving Ormeau Embankment will transport spectators back to Stormont.
Where can I watch the Belfast marathon?
Mark Simpson and Nicola McCarthy will present live coverage from around the course with live coverage of the race on the BBC iPlayer and the BBC NI Sport website or listen on Radio Ulster from 08:45 BST on Sunday.
For those watching at home, you can submit a message of support and good luck here.
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