Every night here a heavy dew falls from the sky at night. As the sun rises, it evaporates the moisture from the dense foliage that covers the mountain, causing an effect that looks like a small camp of invisible hobos heating up their breakfast in the distance.
On especially moist days, I often wake up in a cloud of this fog so dense I can barely make out anything over the next hill. Sometimes I see a cloud on the highway, hanging low between two mountains, and I get to drive through it. Occasionally, it will even great me with a 20 second downpour.