Ehxcellent. I got my bike rack from Sports Authority, and it's probably the kind that would adapt to a flatback car okay. (If you want to test it out, let me know.) Of course, my bike is long-framed enough that it's very awkward on the rack.

And yes, the Minuteman trail is very subtly graded -- the Somerville-to-Arlington-Center portion, about 2 miles long, is like 2d uphill the whole way, so although most of it is a straightaway, it's weirdly tiring.