I've done many 1,000 mile days in under 24 hours - but never did the IBA documentation crap. Need to do it once just to say I did. 2-3 times each summer I ride out to Utah and usually do Indy to Denver in one go - right around 1,100 miles. With time changes, it's just easier for me to do it heading west rather than coming back east. Just seems easier to me. I did Ouray, CO to Indy once, non stop but it took over 24 hours and I did it mostly by accident as I could find any hotels anywhere. IT hurt for a few days after that and I'd not do it again. It was around 1,300 miles and my longest non stop ride. Took me around 32 hours. The last 150 miles I bet I stopped at each exit as I was so tired and burnt from riding. The hard part, for me anyway, isn't the seat you're on but rather the mental alertness. With 1K miles in 24 hours, you'll have time to stop and sleep a bit If you average 65 mph moving miles per hour, you'll have time for 6-7 hours of sleep in there with no problem. If you do all freeway, I'd plan a 5 hour stop someplace to sleep and then continue on afterwards. It's really pretty easy to do.