for your long-term development in cycling, recovery is almost as important as how you train...
oh yeah, congrats on the 100!
total recovery when you really trash your body can take as long as 2 weeks... but usually is more like a few days.
personally, after a really hard ride, i usually take one day completely off the bike (i commute, so i take the train instead) and maybe do some short cross-train or 15 mknutes REALLY light spinning on the bike (this means if the old lady on the 50s bike passes you, DON'T sprint to not get dropped) and then the next day ride VERY easy.
you've basically got 2 things to deal with:
1) energy, water and vitamin and mineral loss -- make sure to eat and drink and keep these up for proper stores for regeneration
2) muscle actually gets little tears in it when it gets used heavily as well as building up lactate acid from strong execrtion. doing SOME exercise helps stimulate the muscles and help get rid of the acid and other waste, BUT keep it very light so you don't re-tear the muscles in their weakened state
then use muscle soreness and general feeling as a guide. IF your body and mucles are weak, training will usually NOT help, but actually take you back further.
after a complete recovery, your body will have rebuilt itself stronger and you're ready to do another massively painful ride to break it down again and get even stronger!!
i just finished 8 days and 15,000 vertical meters on the mountain bike in my TransAlp tour (see http://mitglied.lycos.de/nathank/
). I took Sunday completely off the bike (OK, i rode to the park) and played basketball. today i rode the 12km commute to work, but rode about 20km/h and everyone passed me and i had to keep repeating "recovery, recovery" over and over in my head soas not to accelerate to not get dropped by old guys riding clunker bikes...