ccnyc - a FELT! Now grrl, that little pony needs to roll during the week

2 or 3 laps of Central Park (6.2 ish mi p/lap) with those nice hills would take you the shake of a lambs tail! Plus, if memory serves, there's no car's in the park after 7:00 PM.

Much more fun than the trainer... but if you gotta do it inside, so be it.

If you're in Brooklyn, not Manhattan... laps in Prospect are just as good.