Rigby has won many of the most prestigious fell races, including Ben Nevis, Borrowdale, the Isle of Jura, Wasdale, the Langdale Horseshoe, Duddon Valley, the Three Shires, Glamaig, and Stuc a' Chroin. His winning times for Ben Nevis and Wasdale, both set in 1990, are among the fastest in the history of those races and have not been beaten since.