Castle and pedestrian access to Swan Park), Westbrook Bridge (officially, Wilson's Bridge), the new Cockhill Bridge (officially opened in 2018) and the old Cockhill Bridge (now a pedestrian bridge). The Mill River, south of the town, is crossed by two bridges: Victoria Bridge (known locally as the Iron Bridge) which is the main point of access to the town and the Mill Bridge which is at the end of the Mill Brae road at the south end of the town. Geology The underlying bedrock includes Fahan slate formation. The river valley of the Mill River flows over a narrow band of Culdaff limestone with a sill of metadolerite along the river's southern embankment extending from the estuarine zone inland. Sandy gravels and conglomerates overlie bedrock. The geology was formed during the Lower Carboniferous Period. The local soils throughout the area range from shallow to moderate depth peaty podzols and established podzolic types with a moderate percentage of loam and sandy clays. Climate Buncrana, like the rest of Ireland, has a temperate oceanic climate, or Cfb on the Köppen climate classification system, characterised by cool summers and mild winters. Ireland's position in the Atlantic Ocean means that its climate is strongly influenced by the Gulf Stream, which keeps it a few degrees warmer than other locations at the same latitude. These are the average temperature and rainfall figures between 1961 and 1990 taken at the Met Éireann weather station at Malin Head, about northwest of Buncrana: Transport Buncrana railway station opened on 9 September 1864, was closed for passenger traffic on 6 September 1948, and finally closed altogether on 10 August 1953. The nearest railway station is operated by Northern Ireland Railways and runs from Londonderry railway station via Coleraine to Belfast Central railway station and Belfast Great Victoria Street railway station. The strategically important Belfast-Derry railway line is to be upgraded to facilitate more frequent trains and improvements to the permanent way such as track and signalling to enable faster services. Buncrana is connected to the rest of the national road network via a regional road, the R238. This connects it to the N13, the national primary road that connects Letterkenny and Derry (it becomes the A2 when it crosses the border). The town is considered the gateway to Inishowen and lies on the "Inishowen 100", an approximate 100-mile route around the peninsula that passes various scenic sites. Local bus