Mud

[dwyer]

Anybody know easiest way to get mud off chain?

[AlaninWales]

Hose, midpoint of the chain drag so that it's away from the bearings. Then (as you did ask for 'easiest') use WD40 for what it's designed for and spray the chain to drive out the water, then oil the chain with your favourite chain oil.

[wahoofish]

Even better, remove the chain. Soak in parrafin and scrub with a toothbrush. Not the easiest but works the best. If you do use wd40, make sure to lubricate with something else before you ride.