From the responses to DGlenday's thread on what is a decent 100 mile time for riders over 50, it's clear that many in this forum ride centuries quite often, and that others aspire to do so in the future. I think that's impressive, and that it might be nice to have a thread where people posted the details of these rides. Fast or slow, it doesn't matter; they're all a cause for celebration.
I haven't completed one yet this year, but I'll start the ball rolling with my most recent:
Distance: 128 miles
Elevation gain: 6492 feet
Riding time: 7:36:31
Total time: 8:38:00 (long lunch!)