Mukilteo was one of the places I've visited over my winter break. It's located north of Lynnwood in Washington. I went on Christmas eve and the lighthouse did not open on holidays, sadly. Since I was there anyways, I got to take some pictures at the park in while it was ridiculously cold from the wind. It was as cold as being up in the snow mountains.
I recommend checking out Mukilteo at least once if you are to travel to Washington :)