Originally Posted by
Lucky07
I'll be staying at my brother in law's on Sheridan which I believe is south of Market. That'll be my starting point.
Here's
a collection of route sheets for rides starting in San Francisco.
Look for the ones that start from "Sports Basement," a local sporting goods store which is on 6th Street in SoMa. (There are also rides starting from "Presidio Sports Basement" -- but that's another branch of the chain, nearer to the Golden Gate Bridge.)