Great Rigg is a Lake District fell of 766.4 m in Westmorland and Furness. It rises only 31 m above its key col, 4.0% of its height.
It sits below Fairfield, only 1.4 km to the north and 106.9 m higher. Its drop of 31 m makes it a Hewitt but is short of the 150 m a Marilyn needs. The key col is close by, only 0.3 km to the north at 735 m. Its nearest higher summit, Fairfield, is also the hill its key col leads to.