Any cunning ye olde handed-down-through-generations-of-fell-runners tips?
If it's been a really wet race, where there's peat lining the inside of my Mud-Claws (to the point of almost 'staining' your feet!), I'll use the hosepipe, & a scrub with the Yard-brush, to wash the worst off.
Most of the time, unless they're absolutely sodden (as they were after the 'Auld Lang Syne') they'll be left dry out naturally - very rarely they'll be dried out on a radiator, if I need them for a race the following day
(which happened; 16th Feb = Ovenden Fell-Race, & 17th Feb = PECO-XC)