the hills of san francisco

I walk these hills every day, two times a day. Once in the morning to get to Bart to go to work. Once in the afternoon to go home from Bart. Takes me about half an hour each time.
Up the hill...
...down the hill...
...up another hill...
...with my comfy walking shoes...
As you can see, this is a very steep hill.

I've got legs and buns of steel thanks to all this walking up and down the hills. This is how I can afford to gorge on fatty foods all weekend.