Bull Island (North Bull Island) was created by tidal deposits of sand and silt following the building of the North Bull Wall early in the 19th century. Captain William Bligh had recommended the construction of the wall following a survey of Dublin Bay in 1801.
It can be accessed via a wooden bridge at O 21061 36027 A or via the causeway road at O22210 37529 B.
The island is a nature reserve of international importance and is home several protected species. It is mostly owned by Dublin City Council (DCC) who estimate that it receives up to 2 million visitors yearly. To protect the wildlife and their habitats, DCC implemented a Visitor Access Management Plan on 30th April 2023. This plan requires visitors to avoid certain areas of the island. The point designated as the summit of Bull Island at O25288 38382 C, is within an area which should now be left completely undisturbed by visitors. For summiteering purposes, it is considered sufficient to visit a point on the beach at the base of the dunes at Easting O 24600 37800 D. There is no need to access or disturb the dunes. Linkback: https://mountainviews.ie/summit/2328/comment/19244/