I've always wondered if Stoodley Pike is the most visited spot in fell races (not counting races that do laps). It may well be challenged by the Jubilee Tower on Moel Famau but it's got to be in with a shout.
Off the top of my head
Stoodley Pike
Shepherds Skyline
Calderdale Way
Good Shepherd (twice from different directions)
Coiners
Howarth Hobble
Noon Stone (!)
Please feel free to nominate somewhere else
I've sampled quite a few of these in recent weeks; Stoodley Pike, Cragg Vale, Tom Tittiman, Reservoir Boggs, Wicken Hil Whizz, Jubilee Race - what I have missed? Think Eddies Revenge would have counted