The River Forth is one of Scotland's most storied and significant waterways, stretching approximately 47 kilometres (29 miles) through some of the country's most dramatic and varied landscapes. Rising in the mountainous Trossachs region near Loch Ard — roughly 30 kilometres west of Stirling — the river flows eastward through Aberfoyle before being joined by the River Teith and the River Allan. Continuing east across the Carse of Stirling, it passes through Cambus, where it meets the River Devon, and then through Alloa and Airth before widening into the famous Firth of Forth estuary beyond Kincardine. This transition from tumbling highland freestone river to broad lowland waterway gives the Forth an extraordinary diversity of fishing character, from boulder-strewn pocket water in the upper reaches to slower, deeper runs in the lower stretches.