Hundreds of people attended the funeral of mountaineer Ian McKeever in Co Wicklow.
The adventurer died on Mount Kilimanjaro last week after he was struck by lightning during a storm.
Many young people, who climbed the Tanzanian mountain with Mr Keever, were among the congregation at the Church of St Laurence O'Toole in Roundwood.
Mr McKeever's parents and fiancée were among the mourners.
The Taoiseach was represented by his Aide-de-Camp Commandant Michael Treacy.
Mr McKeever was cremated in a private ceremony after the funeral mass.
The 42-year-old was leading a group of climbers, including several people from Ireland, when they were struck by a lightning storm three days into the climb.
Mr McKeever was a well-known figure in adventure sports and had attempted several world records, including the Seven Summits Challenge in 2007.
In his last blog entry in October, he reflected on a tough but rewarding season climbing on Kilimanjaro and considered how heroes are judged.
He wrote: "A hero is someone we can all admire without apology."