Base Brown is a Lake District fell of 646 m in Cumberland. It rises only 38 m above its key col, 5.9% of its height.
Its key col leads to Great Gable, not to its nearest higher summit, Brandreth. It shares its height of 646 m with Craignaw. Its drop of 38 m makes it a Hewitt but is short of the 150 m a Marilyn needs. It falls on two OS 1:50,000 sheets, 89 and 90.