I can usually count on the fog to settle in right about now as I pack up my family for the summer and head to Northern California and the East Coast for warmer weather, but yesterday brought one of those days that makes leaving San Francisco for two months almost unbearable. I went on a long run and within the span of just over an hour I fell, once again, head over heels for my city.

While running I basked in the beauty of my environment and realized it's the fog I needed to thank. You see, I know that without the cold, wet misery of fog I might become complacent in my appreciation for a day like this one. In other words, I need the fog, so I never take the sun for granted.

While I don't usually run with my phone, I had it with me yesterday because school's out and the kids were home. My run takes me from my house, up and down hills, through the woods, under the Golden Gate Bridge, to the beach and back home.

Photography exhibit along the trails. Remarkably, the Presidio has regular art installations sporadically displayed along the trails, including sculptures by Andy Goldsworthy. — Photography exhibit along the trails. Remarkably, the Presidio has regular art installations sporadically displayed along the trails, including sculptures by Andy Goldsworthy.

Inevitably the fog will return and when it does I'll remember to gratefully wear my down jacket in June.