The Booterstown Nature Reserve is a sanctuary for wildlife, and is an unusual little piece of wilderness within the confines of the City of Dublin, Ireland. The Reserve is situated on the edge of Dublin Bay, about 6 km south-east of Dublin city centre. Sandwiched between the main road and the Dublin Area Rapid Transport (DART) railway line, it   covers an area of just 4 hectares, and is the only salt marsh nature reserve in Dun Laoghaire-Rathdown County. The elevated surroundings of the marsh make it particularly suitable for the study of wildlife, especially birds, without causing any disturbance to the feeding flocks.