Knocksink Wood is a Special Area of Conservation. It is situated in the valley of the Glencullen River north-west of Enniskerry which winds its way over granite boulders along the valley floor. The steep sides of the valley are covered with mature deciduous woodland such as Oak, Holly, Hazel, Ash, Alder and Beech.
Knocksink is home to several rare and threatened Irish species of plants, including Blue Fleabane (Erigeron acer), Ivy-leaved Bellflower (Wahlenbergia hederacea) and Yellow Archangel (Lamiastrum galeobdolon).
This site has one of the most diverse woodland invertebrate faunas in Ireland incorporating wet woodland organisms threatened internationally within the EU. Animals noted in the vicinity, either by tracks, sett or sight, include Red Squirrel, Badger, Rabbit and Deer. The woodland supports large populations of birds, including Robin, Blackbird, Song Thrush, Wren, Chaffinch and crows, such as Rook, Hooded Crow, Magpie, Jackdaw and Raven. A Buzzard has been noted in the area and Dipper are occasionally seen in the river.
The importance of this site lies in the diversity of woodland habitats which occur. The presence of rare or threatened plants and animals adds to the interest.
Situated in the Glencullen river valley just north of Enniskerry. Entry to Knocksink Wood is from the Dublin Road.
The number 44 bus goes from Townsend Street in the city center, about every 45 minutes, to Enniskerry and will take about 1 hour.
The other option is to take the DART to Bray and then take the number 185 bus from Bray to Enniskerry. This bus takes about 30 minutes from Bray.