Did it twice in a car from Tulsa to Cypress, CA, 1450 miles in 21 hours Nissan pickup and Miata. Several times from SoCal to Casper, WY, or back, 1150 miles in 16 hours.
Most I've done on a bike was 530 on a Norton Club Buttbuster ride through interesting roads up to Santa Maria and back to Orange County. I've never been too interested in cross country motorcycling. Don't know why. I even set up a 1000 plus mile ride for a club I was in to get the Iron Butt award. I didn't go on the ride though. Actually I don't think I went because of work...but not too highly motivated either. Several guys did do it, though.
Bare