The Coulee Corridor National Scenic Byway goes from Omak to Othello, about 150 miles. We picked it up at Soap Lake and drove north 50 miles to the dam.
We got to Grand Coulee Dam about 2:30. After school starts, they do more tours on weekends than during the week. This is Monday, and we msised the afternoon tour by minutes. The Laser Light Show didn't start until 8:30 so we were too early for that. (Maybe I can get George to come back sometime within the next 25 years; we can camp somewhere closer, get there earlier and stay later.)
Check out the picture in the middle--that's the queen and 50 princesses from the 1951 Washington State Apple Blossom Festival symbolically pouring water over the dam. Only in America...
A word about advance planning. I'm usually pretty good about preparing for a trip before we leave. Not only did I not check times for the tour and Laser Show, but I didn't realize until later that had we driven another mile past the dam, George could have gotten another Passport stamp. Oh, well, one more reason to go back!
More pictures here: Coulee Corridor Natl Scenic Byway