The Carryduff River is a minor river in County Down

County Down

-Cities:*Belfast *Newry -Large towns:*Dundonald*Newtownards*Bangor-Medium towns:...

, Northern Ireland

Northern Ireland

Northern Ireland is one of the four countries of the United Kingdom. Situated in the north-east of the island of Ireland, it shares a border with the Republic of Ireland to the south and west...

. It is not navigable.

The river rises in Killinure

Killinure

Killinure is a townland in County Down, Northern Ireland, lying on the south-east border of Carryduff.It is approximately 770 acres in area, and still consists mostly of farmland, although since the 1990s, the housing developments of Carryduff have begun to encroach on its north-west corner .It...

 townland, in the boggy ground at the northern base of Ouley Hill

Ouley Hill

Ouley Hill is the highest hill in County Down Northern Ireland, between Carryduff and Saintfield at 180m.It was the site of a battle in the Irish Rebellion of 1798....

 (186 metres), and is fed by numerous drainage ditches as it passes through the farmland to the south of the town of Carryduff

Carryduff

Carryduff is a small town and townland in County Down, Northern Ireland, about south of Belfast city centre. It had a population of 6,595 people in the 2001 Census....

. From here it passes beside Carryduff open reservoir and flows north down through a gap in the Castlereagh Hills, joining with Purdysburn, in to the Lagan

River Lagan

The River Lagan is a major river in Northern Ireland which runs 40 miles from the Slieve Croob mountain in County Down to Belfast where it enters Belfast Lough, an inlet of the Irish Sea. The River Lagan forms much of the border between County Antrim and County Down. It rises as a tiny fast...

 valley, joining the River Lagan at Minnowburn.

The original village of Carryduff grew up at the point where the routes south out of Belfast

Belfast

Belfast is the capital of and largest city in Northern Ireland. By population, it is the 14th biggest city in the United Kingdom and second biggest on the island of Ireland . It is the seat of the devolved government and legislative Northern Ireland Assembly...

 to Downpatrick

Downpatrick

Downpatrick is a medium-sized town about 33 km south of Belfast in County Down, Northern Ireland. It is the county town of Down with a rich history and strong connection to Saint Patrick. It had a population of 10,316 at the 2001 Census...

 and Newcastle

Newcastle, County Down

Newcastle is a small town in County Down, Northern Ireland. It had a population of 7,444 people recorded in the 2001 Census. The seaside resort lies on the Irish Sea coast at the base of Slieve Donard, one of the Mourne Mountains, and is known for its sandy beach and the Royal County Down Golf Club...

, and the east-west routes from Hillsborough

Hillsborough, County Down

Hillsborough is a village and townland in County Down, Northern Ireland, situated from the city of Belfast. It is within the Lisburn City Council area....

 to the head of Strangford Lough

Strangford Lough

Strangford Lough, sometimes Strangford Loch, is a large sea loch or inlet in County Down, Northern Ireland. It is separated from the Irish Sea by the Ards Peninsula. The name Strangford is derived ; describing the fast-flowing narrows at its mouth...

, all met at the Carryduff River.

The Carryduff River has been covered over and encased in a pipe for some of its stretch through the town.