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.