Hallin Fell is a hill in the English Lake District surrounded on three sides by Ullswater.

The outflows of Rampsgill, Bannerdale and Boredale are deflected west around the fell, eventually finding the shore of Ullswater at Sandwick.

The southern boundaries of the fell are therefore easily defined by these watercourses and the Howtown to Sandwick road with its ferocious hairpin climb to The Hause.

[1] There is rougher ground on the other sides and Hallin Fell's northernmost extremity — Geordie's Crag — projects into the lake, separating Ullswater's middle and lower reaches.

This route, mainly in wooded surroundings and with some gentle scrambling over outcrops, can be combined with a trip on the Ullswater steamer to provide a fine low-level excursion.