The two main rivers of Devon which contain grayling are the Tamar and the Exe. The tributaries of these rivers also have them, the main ones worth mentioning are the lower reaches of the Barle and Creedy before they join the Exe, the Tamar the Lyd,Inny and Ottery although the Inny and Ottery are just inside Cornwall.
Heading to one of Devon’s other borders it is worth mentioning the Tone in Somerset which is a great little river that boasts a good head of grayling too.
The number of grayling in Devon’s rivers are small compared to their chalkstream cousins and as the rivers of the Westcountry are fed by rainfall, the grayling will be more nomadic.
Trout tactics will work well for grayling along with the more modern long rod, short line and heavy bug techniques.
When the water is low and clear though there is nothing more exciting than landing your dry fly over a grayling and seeing him rise to it!