Thousands of people have walked, swum, sailed and run their way from Darkness into Light this morning.
The annual fundraiser for suicide charity Pieta House, last year raised over 4-million euro - with events taking place at dozens of locations in Ireland - and 14 other countries.
Cork Prison was one of the more unique locations where a Darkness Into Light walk was hosted at 4am, with six inmates unlocked from their cells for 10 laps of the 500 perimeter walk within the prison walls along with 25 members of staff.
It's the first time such an event has taken place in a closed prison.