There has already been a winner of this year's Flora Women's Mini Marathon in Dublin.
Barbara Cleary from Donore Harriers passed the finish line with a time of 34 minutes 7 seconds.
Tens of thousands ran, walked and jogged the marathon.
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The 10k got underway at 2 o'clock this afternoon.
Last year around 40-thousand turned out, raising more than €12m for 700 different charities.
The Mini Marathon has been run on the streets of the capital since 1983 and is the biggest female-only race in the world.
Meanwhile, in Cork city, more than 9,000 competitors take part in the Cork City Marathon.
That race got under way at 9am.
The spokesperson for the mini-marathon is Muireann Fitzmaurice:
