Located at the end of Millennium Avenue at the National Arboretum is the Ulster Ash Grove. Planted as a living tribute to the members of the Royal Ulster Constabulary GC, the Royal Ulster Constabulary Reserve, the Armed Forces and other organisations in the service of the crown, the monument is dedicated to all those who lost their lives during the troubles in Northern Ireland between 1969 and 2001. The weeping ash trees planted within the grove represent the lives lost in pursuit of peace and form a changing backdrop to the stone circle and Mourne granite pillar.
The circle contains one block of stone quarried from each of the six counties (Down, Armagh, Fermanagh, Tyrone, Londonderry & Antrim) and are placed to form a symbolic map of Northern Ireland. The Ulster Grove memorial was dedicated on 23rd September 2003 – the anniversary of the death of the first soldier in 1969.