It's been a while since I looked at the 50+ forum, and now I find a 65+ thread. Okay, so I'm 68 trying to act like I'm still 30 (and largely doing okay except every once in a while). Today I took a vacation day and rode my Masi, vintage ride for a vintage rider, for 53.8 miles.
FWIW, I commute 16 to 17 miles each way to work. With recreational riding on the weekends it comes out to about 8000 miles a year. But it's tough pretending I'm still 30.