I ran the Manchester marathon and felt worst at the end then i did after finishing the Thames Path 100 in sleet and with hypothermia. You had to keep up the Ultra spirit to find your baggage in that muddy tent
Still cant decide whether to go for road or trail. I ran Round Rotherham in road this year and it was very muddy in places which resulted in me falling comedy banana slip style in the mud. Dont fancy that as it doesnt look like there are showers at the finish.