100 mile mntn bike race--who's done one?

[Catrin]

I've never raced one (hah - or riddein anywhere near 100 miles) but the BF does Shenandoah Mountain 100 every other year. I know he does big mtb trips on weekends but does lots of road riding during the week to train.

I've several friends who do the same thing. They don't race at all, but do lots of mountain biking on the weekends and try to road ride at least 100 miles during the week to keep in shape for the trails.