mort - the 50mile challenge looks tops, think i will put it in the diary for next year and also think about the 30m one in september. am doing osmotherley phoenix, 32miles, on the 6th July..they have a 17 or 26mile option as well, but am guessing its a little late for you. i wouldnt mind finding a mara for late june, but think its prolly a bit of a logistical nightmare.