From SFBC:
JFK Drive in Golden Gate Park is a treasured “everybody on a bike” space, welcoming and fun for pedalers of all ages and abilities, especially on car-free days. But biking to JFK Drive can be challenging, with access routes into the park in need of much improvement. Join this survey ride to take a look at the state of bike access into GG Park and help plan solutions to connect JFK Drive to the rest of the city.
5-10 miles, mostly flat
Free to SF Bicycle Coalition Members, suggested $10 donation for non-members