Loughrigg Fell is a Lake District fell of 335.1 m in Westmorland and Furness. It sits below Nab Scar, only 2.3 km to the north and 114.9 m higher.
It is one of the 39 Wainwrights that are also Marilyns. Only three of the 242 hills profiled in England are lower. It is 315.9 m below the average height of the 103 register hills in Westmorland and Furness. The summit is marked by a trig point.