It'd be more than embarrassing if I went wrong on the Chevin section given the Big Hill as we call the path from the road back up to the woods is a regular club training feature. It's a tough enough climb less than 2 miles into a training run let alone 20 miles into an event....so I've told myself not to overdo the downhill road section before that climb (whether I'll heed my own advice remains to be seen!)..