The Annual Abbott Longford Marathon takes place tomorrow.
The N63 will be closed coming into Longford from the Athlone turnoff between 9am and 10am.
Runners will be on the N5 from Tarmonbarry to Rooskey on the L1415 and on the N6 heading towards Longford between 9am and 3pm.
The road from the post office to the Longford Arms will be closed from 6am to 6pm in Longford town.
Fiona Fenelon has given this advice to motorists who will be in the Longford town area on Sunday.