Mark, who runs MC Strength & Conditioning in Dungarvan, is no stranger to taking on strenuous and daring charity challenges. This time, he's decided to cover 200km around the terrain of Mount Melleray, the Knockmealdown Mountains, and Cappoquin, by cycling, hiking and running.
Mark will embark on the journey on May 14th and he's expecting it will take over 24 hours. He explains to Andy and me why he choose Laura Lynn Children's Hospice as his charity, as well as explaining how you can donate.
Have a listen back to his chat with us on The Big Breakfast Blaa..