Harter Fell (Mardale) is a Lake District fell of 779 m in Westmorland and Furness. It shares its height of 779 m with Sgurr Mhic Bharraich.
On the Wainwrights height ladder it sits between Kidsty Pike (781 m) and Red Screes (778.8 m). Its drop of 149.2 m makes it a Hewitt but is short of the 150 m a Marilyn needs. Its nearest higher summit, High Street, is also the hill its key col leads to.