Nairnshire is about 22 miles in length and 15miles (35x24 km) in breadth; comprising an area of , or 128,000 acres. The county consists of a flattish coastal region where the vast majority of the population live, with a sparsely populated hilly interior, rising to the foothills of the Grampian Mountains in the south. These moorlands reach 634m at Carn nam Bain-tighearna, on the county march (boundary) just east of Slochd summit on the A9. There is no old-established name for these heights, but they have been termed the Nairnshire Hills. The coast forms an arc shape, with the Whiteness Head peninsula in the west and The Bar peninsula in the east. The main rivers are the River Nairn and the Findhorn, which both follow deeply incised courses across the general slope northwards. The chief bodies of water are Loch Loy, Cran Loch, Clunas Reservoir, Loch of Boath and Loch Kirkcaldy.