hidden bike track

i took my bike and guitar down to the boate today, and went for a ride towards a big tent (lower left). some horse circus variant of cirque du soleil (with requisite euro name: cavalia) is setting up near golden gate fields, apparently irritating the local stage workers, who are out picketing in force.
on the way there, i cut through a small hole in a big bramble patch, over a trampled down chain link fence, and found this hidden bmx track. i got all rad, getting air and in general tearing it up….but you’ll just have to take my word for it, because no one was there to take pictures.