Metric century = ~62 miles?
I did 63 on my Trek 7100 Multitrack this May on the first day of the Seacoast Bike Tour, then another 35 miles on Sunday.
Felt great, but I'm going to upgrade to a road bike before next year's event. Not for comfort, but for speed. I'd like to be able to ride longer distances but that means rideing faster to stay within the time limit for the event.