We took the Tiburon Ferry to the Island. Once at the Island, we rented bikes and toured the island. Some of the paths are uphill for very athletic bikers, you might be able to make it uphill. We had to walk up. But was fun coasting downhill. Great views of the city and the GGB. We stopped at the Safeway and loaded a picnic lunch. We found a bench and had a great view and a good lunch. We saw only a handful of people on the island while we were there and felt like it was our own. Saw deer, too.