Ronin, two options I've done are from just above the cattle grid on Wells Road in Ilkley up the hill-side past White Wells and then up to the big cairn above the stone steps above Rocky Valley or straight down from Surprise View car park North as far as you can and back up
Ilkley rep is roughly 550ft in 3/4miles, Chevin about 600ft in slightly less
if you're coming over drop me a pm and I'll have a run out with you if you fancy a bit of company