I'm signed up for a 100+ (107 miles to be exact, plus probably another 8 junk miles to the start and back) ride in 5 weeks. Been training since Feb, on the road or trainer depending on the weather. I've been riding 100+ miles a week for the last 4 weeks (some of them trainer rides), with my longest road ride being 63 miles. Think I'll be fit enough for this ride. There's a 10 hour time limit and I'll probably need all 10!