A friend is proposing me to do a 100K in September. Have done about 10 marathons in the last 15 years, ranging from 3:32 (first one) to 3:01 (fastest). Last one was 2 years ago (a 3:13). Will I be able to up my mileage in the next 3 months to be able to make it? According to this link, I could multiply marathon time by 2.8 to get a rough estimate. (
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Ah, 9 hrs of running, doesn't sound so entertaining....but would be a nice "I have done that" badge to own :-)