Some very impressive rides there.
My longest so far was 900 miles in a day on my Ducati M900 Monster, on the first day of doing 2700 miles in four days, San Diego to Cleveland. I only had those four days between jobs to get there, so that's what I did.
The 900 was a very long day. I can do 600 mile days on that bike for days in a row. I'm thinking of doing a couple of the easier IBA runs (SS1000, BB1500), just for the experience and to be able to say I did it.
1993 Ducati M900 Monster "Patina" (220,000 miles, so far) -- 1995 Ducati M900 (wife's bike) -- 1972 Honda CB450 (daughter's bike) -- 1979 Vespa P200 (daughter's scoot) -- 1967 Alfa Romeo GT Jr. (1300cc) -- 1964 Vespa GS160 (160cc 2-stroke) -- 1962 Maicoletta scooter (275cc 2-stroke) -- 1960 Heinkel Tourist 103A1 scooter "Elroy" (175cc 4-stroke)