Caher is the 200th-highest mountain in Britain and Ireland on the Simm classification. Caher is regarded by the Scottish Mountaineering Club (SMC) as one of 34 Furths, which is a mountain above in elevation, and meets the other SMC criteria for a Munro (e.g. sufficient separation), but which is outside of (or furth) Scotland; which is why Caher is sometimes referred to as one of the 13 Irish Munros. Caher's prominence qualifies it to meet the Arderin classification, and the British Isles Simm and Hewitt classifications. Caher does not appear in the MountainViews Online Database, 100 Highest Irish Mountains, as it is below the required the prominence threshold of .