Six men from Donegal are getting on their bikes for a three day charity challenge to cycle the length of the country.
They'll set out from Mizen Head in Co. Cork today and aim to reach Malin Head by Saturday.
It's all in the name of charity. The group is hoping to raise funds for the Ronald McDonald house for sick children and their families - and spun-out-dot-ie, which is a national youth organisation.
One of those involved is Ted McCaffrey, who lost his brother Bobby to suicide at the age of 21.
He has this message for anyone who'd like to support the cause: