Weather conditions are described as good for the thousands of people making the annual Croagh Patrick pilgrimage.
The Archbishop of Tuam Michael Neary led the pilgrimage on the holy mountain this morning, and celebrated Mass on the summit.
In his homily, Archbishop neary noted the slow, silent decline of faith in Ireland, and said pilgrimages provide an opportunity to take stock, and also a time to discover new heart.
He said the call of Croagh Patrick is a call to holiness, to meaning, belonging and home.
140 rescue volunteers are also taking part in the annual Reek pilgrimage this weekend, with volunteers from all 11 mountain rescue teams in Ireland assisted by the Calder Valley Mountain Rescue team from the UK.
Four people have been treated for injuries so far today, with one man being airlifted to hospital with chest pains.