The Pacific Northwest is one of the big logging areas of the US - a fact that I had forgotten. Both Washington and Oregon have regulations that make sure that once trees get chopped down, replacements are planted. Signs are posted nearby saying "planted 1983, thinned, 1995, harvested, 2050" or something like that. Pretty fascinating to someone new to area. And there are all these trucks driving around:
Pictures from Olympic here.
Pictures from the entire trip here.