Thunacar Knott is a Lake District fell of 723 m in Westmorland and Furness. It rises only 28 m above its key col, 3.9% of its height.
Its key col leads to High Raise, not to its nearest higher summit, Harrison Stickle. It shares its height of 723 m with Ullscarf. On the Wainwrights height ladder it sits between Ullscarf (723 m) and Froswick (720 m). Pavey Ark stands only 0.5 km to the east. The key col is close by, only 0.2 km to the south-east at 695 m. It falls on two OS 1:50,000 sheets, 89 and 90.
