Birkhouse Moor is a fell in the English Lake District, an outlier of the Helvellyn range in the Eastern Fells. It is properly an eastern ridge of Helvellyn, but was treated as a separate fell by Alfred Wainwright in his Pictorial Guide to the Lakeland Fells. That convention is followed here.
To the south of the Striding Edge- Birkhouse Moor ridge runs the long valley of Grisedale, emptying into the head of Ullswater. There are small pockets of mixed woodland on the lower slopes and above these the valley wall is steep sided with some outcropping rock.
The northern side of Birkhouse Moor is bounded by the more complex Glenridding valley system. Glenridding Beck has three principal southern tributaries:- Mires Beck, Bleacove Beck and Red Tarn Beck. Mires Beck flows from Little Cove, a small corrie separating Keldas and the Nab. Bleacove Beck empties Blea Cove, a short side valley between The Nab and the north ridge. Red Tarn Beck forms the western perimeter of Birkhouse Moor, draining the large tarn of that name nestling beneath the summit of Helvellyn. There is more rock on this side, with Nab Crag rising above Blea Cove and extensive outcropping on all three ridges. There remains evidence on the Glenridding slopes of the former activities of Greenside Lead Mine. Several leats and pipelines can still be traced which once captured the water of these streams for industrial use.
Keldas is separated from the main body of Birkhouse Moor by a small depression containing Lanty's Tarn. This small waterbody gains its name from Lancelot Dobson, an earlier landowner. It was later bought by the owners of Patterdale Hall, the Marshall family, and extended by damming. In addition to fishing, the tarn was used as a source of ice in winter, and the ice house still stands nearby. The summit of Keldas is privately owned but public access is permitted. Standing above the head of Ullswater it provides superb views down the lake, with the 'Keldas Pines' giving an excellent foreground for pictures.