St John's Beck

Packhorse bridge over St John's Beck

St John's Beck is a river in the Lake District of Cumberland.

The beck has its beginning as an outflow of Thirlmere, whence it flows northwards under the A591 then through St John's in the Vale, towards Threlkeld, where it meets the River Glenderamackin to form the River Greta, upriver from Keswick.

The B5322 Legburthwaite to Threkeld road follows the beck down. To the east rises the high bulk of Matterdale Common, and to the west is a lower ridge separating the dale from the Naddle Beck and beyond it Keswick and Derwent Water.