Any ride is "a good ride". Seriously. Any ride provides health benefits, no matter if it's long or short. Secondly, every person is different in terms of their fitness and gear. Someone who's thin and very fit, riding a performance bike can cover twice the ground in an hour that someone who is less fit, not thin, and riding a garden variety bike can cover in an hour. But if the two people both push themselves a bit for the same duration, I'd say they were equally good rides. My suggestion is to be your own yardstick, therefore.
