They'll be cut down for a new cycle route which will take Dubliners into the city centre from Clontarf.
62 trees, some of which are more than 100 years old, lie along the proposed route and are set to be felled. However, over 2,000 people have signed a petition to save them.
City councillors, environmental groups and even cycling groups say the trees should not be sacrificed to make way for the 2.5km cycle path.
As well as them being 109 years old, they were planted on Arbour Day back in 1908", Local Green Party councillor Donna Cooney told 98FM News.
"They started the whole reforestation of Ireland and the first local authority trees that were planted anywhere in Ireland, England, Scotland or Wales".
Dublin City Council say the new cycle route may be scrapped if councillors do not approve the designs. The segregated cycle path was first proposed more than four years ago and would run alongside the seafront on Clontarf Road to the Talbit Street junction and Connolly Station.