It wasn't even on the tick-list I drew up at the start of the year.
But it is famous. Especially after the 2012 Olympic Road Race went up it.
And I'm down in Richmond dog-sitting for my brother-in-law - why not?
We come down a couple of times a year, but in the past my triathlon training has been focused on keeping a constant heart rate, so it was easier to stay within the relatively controlled confines of Richmond Park.
I also felt safer. Traffic here is much busier than where I live in Scotland and I certainly wouldn't tackle it on a Tri-bike.
Now though I'm not training for anything, I'm just enjoying my cycling. So I've been using the GPS routes provided by Dirty Weekend cycling to explore a little further. Today that took me on a 60miler that included Box Hill. The Relive video below gives a good idea of what it was like.