Forth Valley
| Forth | |
| River | |
 The River Forth meanders over fertile farmlands near Stirling
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| Country | Scotland |
|---|---|
| Councils | Stirling |
| City | Stirling |
| Source | Loch Ard (Loch Chon) |
| - elevation | 33 m (108 ft) |
| - coordinates | 56°10′52″N 4°24′30″W / 56.1810°N 4.4084°W |
| Mouth | Firth of Forth, North Sea |
| - elevation | 0 m (0 ft) |
| - coordinates | 56°03′52″N 3°43′37″W / 56.0645°N 3.7270°WCoordinates: 56°03′52″N 3°43′37″W / 56.0645°N 3.7270°W |
| Length | 47 km (29 mi) |
 Course of River Forth
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The River Forth is a major river, 47 km (29 mi) long, whose drainage basin covers much of Stirlingshire in Scotland's Central Belt. The Gaelic name is Abhainn Dubh, meaning "black river", in the upper reach above Stirling. Below the tidal reach, (just after being crossed by the M9 motorway) its name is Uisge For.
The Forth rises in the Trossachs, a mountainous area 30 km (19 mi) west of Stirling. Ben Lomond's eastern slopes drain into the Duchray Water which meets with Avondhu River coming from Loch Ard. The confluence of these two streams is the nominal start of the River Forth. From there it flows roughly eastward, through Aberfoyle, joining with the Kelty Water, about 5 km further downstream. The vast flat expanse of the Carse of Stirling follows including Flanders Moss. It is joined by the River Teith (which itself drains Loch Venachar, Loch Lubnaig, Loch Achray, Loch Katrine, and Loch Voil) just west of the M9, the next tributary being the Allan Water just east of that motorway. From there it meanders into the ancient port of Stirling. At Stirling the river widens, becomes tidal, and it is here that the last (seasonal) ford of the river exists. From Stirling, the Forth flows east accepting the Bannock Burn from the south before passing the town of Fallin. Two towns of Clackmannanshire are then passed: firsly Cambus (where it is joined by the river Devon), closely followed by Alloa. Upon reaching Airth on the south shore and Kincardine on the north, the river begins to widen and becomes the Firth of Forth.
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