Explore San Francisco's parks and get some exercise in the process! San Francisco Recreation and Parks will be organizing and leading weekly free nature walks around San Francisco's many parks! Even if you haven't heard of many parks in San Francisco, we know you know Golden Gate Park. Spanning for more than 1,017 acres, San Francisco's largest park is home to several museums, a conservatory of flowers, a botanical garden, several yearly festivals, a bison paddock, and Stow Lake, a lake filled with ducks, turtles, and rentable paddle boats. On the first Saturday of the month, enjoy a free guided walk around Stow Lake and learn more about it.