Moyrourkan Lake is labelled 18 on the map.

The lake was described in 1838 in the Ordnance Survey Memoirs: "Moyrourkan lough, situated in the eastern part of the parish [of Mullaghbrack] 2 miles north east of Markethill, divided between 4 townlands and elevated to the height of 254 feet above the level of the sea, is three-quarters of a mile iong from the north east to the south west and 220 yards broad from north west to south east. "