Rising on Squire's Hill on the north-western edge of Belfast, the River Farset is on the County Antrim side of the Lagan, and its entry to the Lagan is close to its outflow into Belfast Lough. The Farset is now contained within a tunnel under Belfast's High Street; a tunnel supposedly big enough to take a bus.
Belfast was founded at a sandy ford across the Farset, and this is the origin of the city's name - Béal Feirste, the Mouth of the Sandbar. Farset itself is derived from the Irish word meaning sandbar. The river flowed beside docks on High Street as Belfast grew in the 19th century.
In the 17th, 18th, and 19th centuries, the river was sometimes known as Belfast River, the River of Belfast, the Town River, or the High Street River. Over the course of the 18th century it was gradually covered over; the final section, close to Princes Street, was covered over in 1804.
- Gillespie, Raymond (2007). Early Belfast: The Origins and Growth of an Ulster Town to 1750. Ulster Historical Foundation. p. 11. ISBN 1-903688-72-8.
- Jonathan Bardon, Belfast: An Illustrated History, p. 3 and map on p. 4. The Blackstaff Press, Dundonald, Belfast, 1983 (originally published in 1982).
- "High Street at St Georges". BBC Your Place and Mine - Coast. Retrieved 28 February 2009.
- George Benn, A History of the Town of Belfast (1877), pp. 470, 527 and 548.
- George Benn, op. cit., Vol. 2, pp. 45-46.