Things here are not good. The rivers haven't crested yet and there is widespread flooding. As for trail damage, nobody knows. Last few weeks brought nearly 18 inches of snow in Olympia, which is on the Puget Sound. In the last couple of days we've received six inches of rain in Olympia, in the mountains, they've received as much as 15 inches of rain, which is causing massive snow meltoff in the foothills. Pineapple Express is killing us.
Mt. Rainier National Park has closed its main enterance as a percausion because of the rising creeks. My girlfriend lives near Mt. Rainier and the Puyallup River is rising near flood stage and many people are flooded out of their homes.
If I were to guess, I'd say trail damage in the central and south Cascades is likely. Also Olympic National Park/National Forest.