Stone Arthur is a Lake District fell of 504 m in Westmorland and Furness. It barely stands apart: the summit is only 3 m above the col joining it to higher ground.
Only four Wainwrights have less drop. It sits below Heron Pike (Rydal), only 1.3 km to the south-east and 108 m higher. Its key col leads to Fairfield, not to its nearest higher summit, Heron Pike North Top. Its nearest higher summit, Heron Pike North Top (621.3 m, 1.1 km south-east), is a listed top not profiled here. The highest point is recorded as outcrop, not a cairn.