 The fell is named for the settlement of Armboth which stood on the shore of Thirlmere near the mouth of Fisher Gill.When the level of the lake was raised to create the reservoir in the 1880s, the village was abandoned and submerged.The only remaining structure is the summerhouse of Armboth Hall which lies amid the trees, although a number of ruins, enclosures and tracks can still be found within the forest.