Yeah, thanks, these are competent adult-type riders - but not at all into urban assault riding. I thought Page St from Market might be a doable direct route, but what I know of the area is limited to maps.
DC Bart to GGP is probably the best bet. From DC Bart drop down to Westlake, around Lake Merced, great Highway and viola @ GGP. Great Highway has a nice bike scenic bike path once you pass the Zoo. Riding back requires a little uphill.
I use Page Street all the time and have never had a problem. Cyclists who know how to ride single file and stop at stop signs should be fine. There is a small hill on Page near Market Street. There are bike lanes on Market Street between the Civic Center BART station and Page Street (but Market Street can be very hectic during rush hour).
Check out the Wiggle. It is a bike route that has its own little culture. I usually take Market to the Wiggle (turn off on the bikeway with the huge mural after the Mint and right before you get to the Safeway) and eventually cruise up Haight and/or Page. Not a bad ride if you are used to riding in some traffic.
Which station and streets for a family friendly Sunday ride from BART to GGP, anyone?
Here's a nice website that has helped me navigate this city on the most bike friendly routes. It allows you to enter the start and finish point and it will chart your bike route based on bike-friendly, most direct, hilliness, etc.
Did CC BART to the Wiggle, then up Page. The downhill on Page coming back in traffic is a little startling, that's a fairly steep grade with cars in back trying to beat the light. All and all easy. So much fun we keep going and raced the buses into the financial district down Market. Sure a lot different than the flat open hammerhead roads out east. Thanks for the suggestions.