London's Toughest Hills

Yep - I think.
If you are coming up from Forest Hill train station, and turn left at the Horniman.
It's a fncker. my mate lives halfway up.
That whole area is a bastard.

You'd get used to it - I live up at the top of the hill behind the Horniman when I first ditched the variable transmission in about '96 and now commute over most of the bumps in SE23, SE4, SE26 etc quite happily as well as Dog Kennel Hill. I've not managed to ride over Canonbie Road on fixed yet; on the other hand, Ive not tried for a few years.

And fandango, One Tree Hill is actually quite agreeable on fixed, as the gradient actually slackens off long before you're at the top. In the other direction it's a bit harder though...