The Breffni Three Province Challenge takes place today.
The event features a series of cycles and runs that vary in distance from 5km right up to 100km
The aim is to raise money for three cancer charities, The Friends of St Luke's Dublin, National Breast Cancer Research Institute in Galway, and the Cavan/Monaghan Cancer Homecare Association.
In its 22-year history, the event has raised over €1 million for charity.
The event has gone from strength to strength over the years with over 800 participants taking part, representation from each counties across the country.