In reply to iusedtoclimb:
> Do you know what the race is like? What the running is like?
I actually don't know too much about it but it won't be too remote because it basically circles Grenoble so you'll never be too far away from civilisation. But the 4 massifs it includes (Belledonne, Chartreuse, Vercors and Oisans) are all stunning areas for trail running so I doubt you'll be disappointed, and despite being close to a town, the mountains are pretty big and it will be very little on tarmac.
> 100 miles is all about getting your head sorted - get that right and keep moving and you will be fine (ish). If you have done a few shorter ultras 100 is totally doable. the big issue with this race is the ascent and even more so descending
Agreed about the head thing - mostly comes down to motivation and race management - I had a couple of years off while I did shorter trail stuff but did an 86km in the Drome a few weeks ago and am planning a 110km near the Vercors in October so either UT4M or £chap£e Belle, both near Grenoble, will be obvious choices to step up to 100 miles next year.
In fact, l'£chapp£e belle might be more what you're looking for as it's high up in the Belledonne so might be a bit more remote..
http://www.lechappeebelledonne.com/
*EDIT: I've just checked as I was sure a friend of mine is running the Echappée Belle this weekend - we were chatting about it before a race earlier in the year and he'd heard very good things about it. He finished UTMB last year so should fare OK, but I'll let you know what he has to say about it afterwards.
Post edited at 11:28