I used to ride 100 miles every Saturday and every Sunday, back before
it was a big deal; the same route every time. It's more of a big
deal in an organized ride. If you just go, you just go the distance
you like. As to building up for it, you just take a ride you enjoy
and use the natural inclination to add an addition side trip to
hit another town here and there, from time to time.
Make it a huge circle so you can shortcut home at any point for
breakdown or something.
There's nothing exhausting about 100 miles a day. It's just pacing
and enjoying it.
--
Ron Hardin
On the internet, nobody knows you're a jerk.