This past weekend we did 12 miles around Golden Gate Park. My initial hesitation to ride in the street next to cars disappeared as soon as I told myself that riding a bicycle is just like driving (albeit less body protection and no signal lights).
I was totally aching and quite exhausted after the ride. The slight road inclines caused me much huffing and puffing. But I made it and I can pat myself on the back.
We're riding again this weekend. This time we're going to attempt to ride from Foster City up to Burlingame. Wish me luck. :^_^: