Oh man, that's no lake :grin: that's the Bay!
http://maps.google.com/maps?hl=en&rlz=1G1GGLQ_ENUS294&q=richardson+bay,+tiburon,+ca&um=1&ie=UTF-8&hq=&hnear=Richardson+Bay&gl=us&ei=6jl_TMGTPNmxnAfB67nBAQ&sa=X&oi=geocode_result&ct=title&resnum=1&ved=0CBMQ8gEwAA
very close to SF but no fish, I think...