I 'm training for a half marathon and find this area not too bad for running. I put a few routes on that walkjogrun - if you look at the little icons at the corner of lordship L and blackwater those are mine. My standard sunday route basically links peckham rye, dulwich park, dulwich/sydenham wood and brockwell park coming out to around 17 km. I'm also fond of churning out mile intervals around dulwich park, though one of these days I'm going to get creamed by a pram or a kamikazee kid on those rent-a-bikes. I too am entered in the London marathon ballot, but my plan now is to enter Paris (which is a week later) and defer London until the year after on the odd chance I'm a winner. I've heard that as long as you sign up within the first few days (sept. 15) you're guaranteed to get in to Paris. As an added bonus rumour has it that old men hand out wine in the last few miles.