Record 14,000 participants take part in Dublin City Marathon
A record 14,000 competitors are to pound the streets of the capital during the Dublin Marathon.
Motorists are warned of road closures across the city as runners, joggers and walkers complete the 26 mile circuit.
More than 200 Gardai and Police Service of Northern Ireland officers taking part will wear black ribbons in memory of their colleague, Garda Ciaran Jones.
The garda was swept away by the River Liffey while trying to warn motorists during floods last Monday night.
Dublin Lord Mayor Andrew Montague will race start in Fitzwilliam Street Upper.
Traffic diversions will affect the Rock Road, Merrion Square, Nassau Street and St Stephen's Green.
Jim Aughney, race director, said last year saw a record entry of over 13,000 runners and two new course records set.
"This year, we're looking at another record level of participation and one of the strongest ever international and domestic elite fields," he added.
They include Kenyan Moses Kangogo Kibet, who is hoping to cross the finish line on Merrion Square North first and hold on to his 2010 title, when he set a new course record of 2.08.58.
The Dublin marathon will be televised on RTE.