What is the best road bike trail in the Bay Area?

Question

Looking for a great (scenic) yet challenging road bike trail in the Bay Area?

Answer 1

I'd suggest the Alpine Dam loop which includes a climb up a series of switchbacks to Mount Tam:

http://www.touchstoneclimbing.com/pdf/alpine.pdf

For scenic, you can't beat the windy, treacherous road down to Stinson Beach:

http://www.touchstoneclimbing.com/pdf/stinsonbeachloop.pdf

I've ridden in the Alps and the Pyrenees, and honestly, I think the ride on Hwy 1 to Stinson Beach beats both for scenery.

Note: Neither of these are bike paths, but thse roads are frequented by cyclists.

Answer 2

I bike up tunnel road at least once per week