A large anti-Trump demonstration moved through Dublin on Saturday, with more than 30 groups and political parties involved in a procession from Parnell Square to the area around Dáil Éireann.
Gardaí were deployed in large numbers and temporary road closures were introduced along the route.
Protesters criticised both Trump and the Irish Government's decision to welcome him, with several political parties backing calls for demonstrations during the president's stay.
The scale of the operation has created significant travel restrictions, particularly around locations associated with Trump's movements.
Dublin Airport remained open and operational, although passengers were advised to leave extra time for their journeys. Phoenix Park, which had been heavily secured ahead of Trump's visit, has since reopened.
The security arrangements have now extended to Clare as Trump travels to Doonbeg for the Irish Open, which is being held at Trump International Golf Links & Hotel.
Gardaí and members of the Defence Forces have been involved in security sweeps around the golf resort, while access to parts of Doonbeg village and the Trump hotel has been heavily restricted.
Only local residents will have limited access to some areas, while spectators attending the golf tournament face security procedures similar to those found at an airport.
Additional measures have also been introduced around the area. A temporary maritime exclusion zone and an outer control area are operating along the River Shannon and around Doonbeg, while restrictions have been placed on drone use in several locations.
Shannon Airport remains operational, but passengers have been advised to allow extra time and to have appropriate photo identification and flight documents available.
The security arrangements come as demonstrations continue to accompany Trump's visit.
In Dublin, protesters have objected to the president's presence in Ireland and criticised the Government's approach to the visit. Sinn Féin, the Social Democrats, Labour, the Green Party and People Before Profit have all voiced opposition to the trip.
The Social Democrats described the visit as primarily a golf trip for Trump, while Sinn Féin said its members would join protests.
With Trump now heading towards Doonbeg, the security focus has moved from the streets of Dublin to the west coast, where Gardaí, the Defence Forces and other authorities are managing a tightly controlled operation around the president's visit and the Irish Open.
