I've walked the Community Path, and used to ride the Minuteman from time to time when we lived in Watertown. Ten miles is a good ride for me. I suspect if I took a rest/snack break and walked around a bit, I could do another stretch like that. I once (and only once) did the Minuteman end-to-end-to-end. I was younger then. :-)

I miss being able to rack my bike onto my car. That opened up all kinds of places the T makes inconvenient. The hybrid Camry's tolerances are too tight for my trunk-mounted rack to latch onto, and I haven't cared enough to get a trailer hitch installed for hitch-mounted rack, since that would affect my gas mileage all the time, not just when I had a bike on. I think my best T-assisted access to Porter-Davis-Alewife is probably Orange Line into North Station, then commuter rail back out to Porter. I wonder how hard it would be to move a bike through Charles? I know that is walking distance from North Station.