Cromarty Firth Cromarty Firth The Cromarty Firth (; ; literally "kyles <nowiki>[</nowiki>straits] of Cromarty") is an arm of the Moray Firth in Scotland. The entrance to the Cromarty Firth is guarded by two precipitous headlands; the one on the north 151 metres high and the one on the south 141 metres high — called "The Sutors" from a fancied resemblance to a couple of shoemakers (in Scots, "souters") bent over their lasts. From the Sutors the Firth extends inland in a westerly and then south-westerly direction for a distance of 19 miles (30.6 kilometres). Excepting between Nigg Bay and Cromarty Bay where
Firth "firth" (e.g. the Minch and Loch Torridon); instead, these are often called sea lochs. Before about 1850, the spelling "Frith" was more common. A firth is generally the result of ice age glaciation and is very often associated with a large river, where erosion caused by the tidal effects of incoming sea water passing upriver has widened the riverbed into an estuary. Demarcation can be rather vague. The Firth of Clyde is sometimes thought to include the estuary as far upriver as Dumbarton, but the Ordnance Survey map shows the change from river to firth occurring off Port Glasgow, while