Arnison Crag is a Lake District fell of 433 m in Westmorland and Furness. It rises only 31 m above its key col, 7.2% of its height.
All four of its nearest neighbours are higher, up to Place Fell at 657 m. It sits below Birks, only 1.5 km to the south-west and 191 m higher. Its key col leads to St Sunday Crag, not to its nearest higher summit, Birks. The key col is close by, only 0.1 km to the south at 402 m. It is 218 m below the average height of the 103 register hills in Westmorland and Furness.
