I hired the bike in the end from one of the touristy bike shops. They had some unbelievably nice bikes. Took this Trek as quite fancied trying a 29er anyway.
Rode through the city, over the bridge then took a left and sprinted up the road to the place where I took the photo, over taking 3 lycra clad roadies on full carbon bikes on the way 😀 Then just went and rode all over the Marin headlands. It was a scorching hot day and I took in the wolf ridge trail which made me smile! In all I covered around 40 miles on a mix of road and trail.
The trails I found were nothing like trails in the uk, much more open with just a few tighter features here and there. But the epic views over San Fransisco more than made up for that!
All in all it was a day I’ll always remember 😀