Cascade Range

Here is the very visible edge of the marine cloud layer, leaking over the highest peaks of the Cascades. The clouds cover everything to perhaps 4000ft or so, and then peter out as the land opens up into the interior.

It is as if there is a curtain between the misty drizzle of the coast, and the dry scrublands of central Washington. When the weather is miserable in Puget Sound, it's often lovely east of the passes.