Birk Fell is a Site of Special Scientific Interest (SSSI) in Lake District National Park in Cumbria, England. It is located 2 kilometres (1.2 mi) north of Patterdale, covering 2.66 square kilometres (1.03 sq mi) on the eastern side of Ullswater. Birk Fell SSSI includes the shoreline with Ullswater at Silver Point and Silver Bay as well as the summit of Bleaberry Knott. The eastern boundary of this protected area follows the stream called Scalehow Beck. This area is protected because of the population of juniper trees that occur here. There are scree slopes in this protected area.