Today is Reek Sunday in County Mayo, with up to 10,000 people expected to climb Croagh Patrick.
Pilgrims began the three-mile trip over a 750-metre climb at first light this morning and will continue right throughout the day.
Hourly masses will be held at the summit, and confessions will be heard up to 2 o'clock this afternoon.
The Order of Malta Ambulance Corps are urging pilgrims to climb sensibly this Reek Sunday.