Some 20,000 pilgrims climbed to the top of Croagh Patrick, carrying on what is said to be a 1,500-year tradition known as Reek Sunday. The age-old Reek Sunday tradition is in honor of St. Patrick, who, itis said fasted for 40 days on the Co. Mayo mountain's peak.

Conditions weren't great with low cloud and mist covering the top of the mountain.  The rescue services were kept busy and couldn't call on a helicopter for support, given the conditions. It was reported that more than 40 people were injured on the climb but only two might be described as serious.
Archbishop of Tuam of Dr Michael Neary was one of the first to reach the top where he celebrated Mass. Masses started at 8:00am and, with other priests on hand, continued throughout the morning.  The 20,000 estimate came from RTE. A small army of 20 volunteers spent two days cleaning the route after an estimated 20,000 took part in the walk up the mountain. The volunteers filled 90 bin-bags with litter from the mountain trail.
Authorities are concerned about the litter conditions of the 2,500 foot climb to the peak. They estimate that over 100,000 climbers will attempt the climb this year leaving their mark on the trail in the form of litter.  The route is marked with signs pleading with walkers to bring their litter home with them and walk organizers warn those taking part of strict litter rules.