This weekend a record number of runners will take to the streets for the 17th edition of the Cardiff Half Marathon.
27,500 people will take on the 13.1 mile course around the capital city.
This year it is not only a record number of people taking part, it is also a significant year for female runners who are expected to outnumber male runners for the first time in the event’s 16 year history.
But whether you are taking part or cheering on from the sidelines, here is everything you need to know about the day.
When does it start?Runners will be setting off at 10am on Sunday 6 October with the wheelchair event starting five minutes earlier.
The half-marathon start will be staggered into two parts for safety reasons. The second wave of runners will set off at 10:10am.
If you are running in the first wave, you will be setting off from a white, green or red pen.
Second wave runners, you are in the blue or yellow pens.
What will the weather be like?It is looking promising for the half marathon as it is likely to be dry.
But rain on Saturday night may mean the ground is still damp in places on Sunday morning.
What is the route?Starting from outside Cardiff Castle, runners will take the same iconic route as usual.
Travelling past Cardiff City Stadium on the way to Penarth Marina. Runners will then cross the barrage to Cardiff Bay.
After taking in the view, the course will take people past the Wales Millennium Centre up to the north of the city and around Roath Park Lake.
The final straight will take runners down Edward the VII Avenue towards the finishing line.
The route is ideal for all abilities because it is mostly flat.
What roads will be closed? Most roads along the route will be closed from 9am on Sunday, with Castle Street closed from 4am and reopening at 12pm.
These are the roads closed from 9am and their approximate reopening times:
Wellington Street & Sloper Street - until 11am
Penarth Road & Terra Nova Way - until 12pm
Cardiff Bay Barrage - until 12:30pm
Lloyd George Avenue - until 12:45pm
Tyndall Street & Windsor Road - until 1pm
Richmond Road - until 1:15pm
Albany Road & Ninian Road - until 2pm
Lake Road East - until 2:15pm
Lake Road West - until 2:30pm
Fairoak Road - until 3:15pm
Where can I park?
To avoid traffic people are advised to travel in by train, preferably before race day. If you are taking the train on race day, bear in mind that services on a Sunday morning may be limited and check your train time in advance.
If you are driving, there is a park and walk facility at Cardiff City Football Stadium car park but it will have limited spaces so try and car share where possible.
There are other car parks across the city.
Never mind running, where can I eat and relax?
Apart from all the city centre has to offer, there will be an Event Village on the lawns and car park at City Hall featuring street food and refreshment stalls.
You can find information about what is going on at the 15 entertainment points on the Cardiff Half Marathon App. The App also lets you live track runners.
Where can I leave my baggage?
If you will be donning your trainers but do not want to take your bag 13.1 miles with you, never fear.
There will be baggage tents manned by staff near the Event Village and on Museum Avenue where you can leave a bag.
You can leave one bag with a label attached - you can find your label on the bottom of your race number.
The tents will be open from 8:30am and people are advised to get there before 8:45am so they can get through bag check security in time.
If you forget to collect your bag after you have finished, you can get it from the Run 4 Wales office the next day.
Where is the best place to watch?
The spectator zone on Corbett Road will be back again this year for you to cheer on people approaching the finishing line.
There is also tiered standing terraces on the sidelines this year and big screens showing live coverage on the final stretch.
Some other good spots around the route to watch from are on Penarth Road near Grangetown station, at the end of Lloyd George Avenue as runners turn into Tyndall Street and at the end of Ninian Road near Roath Park Lake.
Good spots for photo opportunities (if you can spot your runner) are down at Cardiff Bay where you can get the sea or buildings like the Senedd, Norwegian Church or Wales Millennium Centre in the background.
What if mother nature calls?
There are toilets located at the Event Village, on the first mile of the course and near the starting line.
There will be water stations at 3, 6, 9 and 11 miles as well as energy gels at mile 6.
Remember to clean up after yourself and dispose of bottles and energy gel packets in the recycling bins throughout the course.
Medical staff will also be at the finish line and on site to offer assistance.
Been there, ran that, got the t-shirt?
You can pick up your 2019 Cardiff University/Cardiff Half Marathon t-shirt after crossing the finish line. Just head straight through to collect it along with a medal, goody bag, fruit and much needed water.
Prizes will be awarded to race winners at 11:30am.