We used to ride down the three grassy hills in that park in the morning on foot brake bikes and throw on the brakes at the bottom. The morning dew would make for great skids all the way to the fence. When we got three speed bikes, we used to ride down church street hill for the thrill of that ride. I put road bars on that bike and use to fly. Once, I got caught in the street car tracks, an event seared in my brain forever. That spot where you took the picture is one of my favorites. I ride there occasionally to remember the fun times we had in that park as kids in the fifties. Baseball ruled that diamond at the bottom of those three grassy hills in the summer. San Francisco is home and a bike riding paradise. Funny, I never rode up hills as a kid but I do now.