Awesome responses. Last year (at about this time) I kept on riding. I developed some symptoms of overtraining (serious night sweats, significant power drop -ie lower lactate threshold tests - , mild anemia but other tests at the Dr. were OK) . I assume it was all overtraining but didn't realise until well into the winter.
It has been 10 days since my last event and I am just now feeling normal (ie sleeping my usual 7 - 8 hours vs 10ish for the last week, and my legs def. feel better). So maybe a few more days off then get back at it.
I ride primarily indoor at a cycling place on computrainers. Tuesday and Thrursday 90 min "classes" in various power zones and up to 3 hours on Sundays all in my aerobic zone.
Thanks for the responses.....please keep 'em coming. I have really become hooked on these ultra events and I am looking to do a 3 - 4 next year.