Poppy, the furthest I've raced before is 8.2 miles, but I have done 13 miles, once, in training, and it was v. tough. Felt good today though, and still up for going dancing tonight (just) so hopeful I'll survive next week, even if last over the line.
Well done Hippo, I'm hoping you're a dr, and not just having to visit sick patients as some sort of hobby. Is that a hippocratic pun in your name then?