A century a week all through the summer. Did 220km in one day on one occassion - ate a lot and it hurt the next day. To be fair I have do run with slicks on days I go a long way. I do like having an mtb as some places I go have fire roads and my snow commuter and flat bar roadie don't cut it there. On the plus side I built legs like tree trunks and my core is stupidly strong.