In the Hoh Rain Forest we went for two short hikes. The first one of them was called "Hall of Mosses" and, as the name promised, mosses seemed to be covering everything there. They were growing on trees, fallen dead tree trunks, stones, occasional benches, and, I'm sure, if we stayed there a bit longer, they would colonize our bodies as well.
It was an absolutely beautiful trail and forest, and I would consider it a must for anybody visiting Olympic NP. Even though the trail was only 0.8-mile long, it took us around 1.5 hours to complete, as we were constantly stopping to ponder the beauty of the surrounding nature. We loved how lush green and serene it was and we were amazed by mosses ability to colonize pretty much everything.
If you go on this hike, make sure not to skip a short spur trail to the Maple Grove, where mosses are particularly pronounced.
A few pictures from the trail: