A Co Down man scaled Slieve Donard four times in less than eight hours as a unique way to celebrate his 44th birthday last week.
Robbie Marsh, from Kilkeel, completed the feat in seven hours 36 minutes, covering a distance of 22.8 miles, with a total of 11,060ft of climbing.
He also completed it quicker on each climb, shaving seven minutes off his time from the first summit to the fourth.
He said: "The Mournes are a magical mountain range that we're lucky to have."
He said it took him three and a half hours to climb Slieve Donard for the first time when he was 35 and weighed 17 stone.
Mr Marsh used this run as training for the 63-mile Courmayeur Champex Chamonix race in Italy he plans to complete in around 24 hours on August 30.
He added: "It was more important to train myself mentally rather than physically."