Rùm rest of the British Isles and Scotland, Rùm features a strongly maritime climate with cool summers and mild winters. There is a MetOffice weather station at Kinloch providing long term climate observations. The main range of hills on Rùm are the Cuillin, usually referred to as the "Rùm Cuillin", in order to distinguish them from the Cuillin of Skye. They are rocky peaks of gabbro, forming the Rum layered intrusion. Geologically, Rùm is the core of a deeply eroded volcano that was active in the Paleogene era some 60 million years ago, and which developed on a pre-existing structure of
A830 road a modern replacement as part of a £23.4m upgrade. The bypassed section has been handed to the local authority for maintenance and designated the B8008. On 25 May 2008 the road was featured in the BBC TV programme "Countryfile". There is a traditional Scottish song about the road, called "The Road to the Isles". The lyrics mention locations the road passes, including (in order): the Cuillin Hills, Tummel, Loch Rannoch, Lochaber, Shiel, Ailort, Morar, the Skerries and the Lews. A satirical song about the road, "The 8-3-0," was written by Ian McCalman (of the Scottish folk group The McCalmans) and