Armboth Fell is a fell in the English Lake District, regarded by Alfred Wainwright as the centre of Lakeland. It is named for the former settlement of Armboth. The fell is a domed plateau, three-quarters of a mile across, jutting out to the east of the Derwentwater-Thirlmere watershed, in the Cumberland district. The fell is wet underfoot, with large areas clad in heather. The eastern slopes above Thirlmere have been planted with conifers.