I flew to visit family in Texas and did the 60 mile 2008 Wurst Ride (
http://www.wurstride.com/) on my Birdy. It was a really nice ride through some beautiful countryside, it was nice to see that Texas isn't just horrible sprawl. And it ended in New Braunfels for the annual beer & sausage festival - that beer was wonderful after 60 miles
I also do 30-50 mile rides in Marin regularly. No problems keeping up with friends on "normal" bikes...