Hundreds of people turned out at Páirc Seán MacDiarmada in Carrick-on-Shannon today to cheer on Jordon Adams as he completed the Leitrim leg of his 33 marathons in 33 days.
He has inherited a gene that means he is almost certain to develop frontotemporal dementia, a condition his mother, Geraldine, died from aged 52.
Our reporter Eoghan Murphy spoke to Jordon, his brother Cian and their dad Glenn after today's marathon.
Listen to the report here and watch videos of the action below: