Spectating in Kent With Fixies Galore

stompy

I hope there aren't any hills on the route down? I'm planning on watching not participating in any climbing.

It's a steady climb out of bowl-shaped London, nothing too bad, then down, then up to the top of the North Downs.
Go to "Show" / "Elevation Profile" on the linked map. The first kink in it is Denmark Hill I think, so you might be able to gauge the rest from that.