OK, IT IS FEBRUARY...
Above, please note above...Hopper's Hands. This is the end of the trail on Crissy Field. The walk used to go around Ft. Point, thus past the concrete chain link barrier, under the bridge and on to Baker Beach, eventually out to the ocean. This all changed on 9/11. In fact , there were armed guards here for quite some time after that.
So this is where most of us feel compelled to touch hands upon the fence and, as you can see at the bottom of the image, where canine participants are encouraged to leave a scent as well. On way or another.
PS who wants quick frogs on the road anyway?