If you are based in SF then this is a definitely worth a day out – whether you are into biking or not. Celia can collect you in town and recommend excellent bike hire. The bikes are full suspension Marins and in great condition (rare for any hire bike). The views across the Bay area from the hire shop is stunning enough but then you get driven by Celia to Marin county over the Golden Gate Bridge. The whole journey is just half an hour but you go from dramatic city skyline to beautiful countryside.
The ride itself has something for everyone and Celia will provide all the support and coaching you need. The trails offer some excellent views so make sure you take a camera.
After the ride you can stop for a beer and a chat with the other bikers who have been on the trail before you get to enjoy the same panoramic views of the city and bay as you get dropped back off in the city.
Dave descending a singletrack and clearing the rock at Tamarancho, Fairfax, Marin County, California.