Anyone who has ever lived in a high mountain valley knows that high pressure in the winter can mean dense fog and temperature inversions. Things are not much different where we live. The advantage here, or sometimes disadvantage, is that we live at the mouth of the Columbia River Gorge. When high pressure parks itself over the Portland area, be it winter or summer, it means strong east winds funneling out of the gorge and into the city. In the summer, it moves our pleasant 75 to 85 degree temperatures into the very high 90s and sometimes over 100, but it usually only lasts three or four days.

There's great wind on the river for sailing, like in this picture taken a couple of summers ago, but Dave says it's like sailing in a convection oven and I don't disagree.
In the winter, those winds keep the fog somewhat cleared out, but we do still get pockets of dense fog in areas that are protected from the wind. You would think that the fog would always be in the same places, but it's not.
Last Saturday morning, it was clear and sunny at our house, so we headed out to the marina to take pictures of the sunrise. There's a place that overlooks the west end of the Portland Channel that affords a nice view of Mt. Hood. We were hoping to get a picture like this,

but when we got to the I-5 Bridge you could barely see the top of it because of the fog, and you could hardly see the water below when we drove over it. We were prepared with a backup plan and drove to other places to take fog pictures.
The railroad tracks run past Vancouver Lake and it's always foggy there in the morning. It was interesting how many pictures you could take of railroad tracks and fog. This was my favorite.

Dave thought black and white would be more interesting.

Notice that he stood on the railroad tracks and I stood in between them. I don't know if that's significant or not. It just adds to the premise that we see the same things, but through different eyes.
Since there are only so many pictures you can take of railroad tracks in fog, we moved on to a popular swimming and fishing hole just west of I-5.

We were almost too late because the sun was rising above the hill and starting to burn off the fog. If you double click on this picture, you can see that a fish jumped just before it was taken.

There's something peaceful about fog rising from the water.

There seem to be about 15 or 20 people out here fishing every morning. Each of them quietly going about their business. They come everyday and I'm sure we'll join them on another foggy morning.