Well I'll ask my Prague colleague who's in our London office atm.
He mentionned a 50km+ trail that goes by several pubs, just outside the city.
Update:
The "trail" is not exactly in Prague, but starts from the town of Nova Pec (southern Bohemia), near the Austrian border. It's by a lake and is very "picturesque" with (little) mountains nearby.
More interestingly, it's got 17km of newly-laid tarmac, all flat. But beyond the new stuff lies about 100km of skateable paths... hmmmm... (and at 50p a pint of beer, that's a skating trip waiting to happen methinks).
