Monaghan Town Runners are set to host their annual 10 mile and 5 mile run today, with the event kicking off at 12:30 pm.
Organisers expect up to 500 runners to take part.
Some traffic disruption is expected in the centre of Monaghan Town between 12:30pm and 1:30 pm.
Motorists are also advised to be mindful of runners on the Monaghan to Ballinode route during this time and to follow the directions of Gardaí and marshalls to ensure the safety of all participants.