I'm a newbie and I've done 32.5 mile on my Trek FX 7.3 - 6.5 miles in errands then a hop on a bus, ride the bus to the end of the line (the line has a dedicated bike path all along the entire route), ride bikes home for an additional 26 miles.
My roommate has a Marin hybrid that he uses as his road bike. He's ridden it on the StP (Seattle to Portland ride - 202 miles) 2-3 times.