"They'll see what I'm doing and they might look into doing something similar themselves, even if it's a smaller race.
The Clondalkin man's journey kicks off this Saturday with a 50km ultra-marathon in Donadea, Kildare and will take him across the country to places including Galway, Laois, Wexford and Dublin.
Some of the challenges he has set himself include running two marathons a day for five days, organised by East of Ireland Marathons.
These runs will take place across Dublin, including Howth and Clontarf, and runners will start at 6am and 2pm daily.
"Of course, I'm hoping not to get injured in any of the marathons, but those few days will probably be the toughest ones logistically, because there's only a few hours break in between them," said Mark.
In another attempt to challenge himself to the limit, he will run a 26-mile race starting at midnight in Leixlip on June 20.
People are encouraged to donate through mycharity.ie, or in person at each marathon