We'll be biking across the S.F. Bridge to Sausalito this Saturday afternoon. I'm interested in checking out the 400+ houseboats at Gate 6 Road. I was mailed a Sausalito map but it doesn't show any distance markers. Has anyone biked out to the houseboat community from the downtown area? About how many miles/minutes by bike? Our time is limited so I want to make sure we have enough time to go there and back before catching the 6:20 pm ferry. Thanks for the help.