Olympic National Park is about one million acres. There is "old growth temperate rain forest" here that once extended from Alaska all along the Pacific coast to central California. This park still reaches the Pacific Ocean for about 70 miles of the Washington state coastline. Hoh rainforest must be named after the Hoh river that runs through here. This rainforest is on the west side of Olympic National Park and it has many trails, picnic areas and camping. Besides the Sitka Spruce Trees that I mention on my "To Vancouver Page", there are groves of Big Leaf Maple, Vine Maple, Douglas Fir, Red Alder, Western Hemlock, Black Cottonwood, and Western Cedar. The Hall of Mosses trail is a really easy loop trail so it will end very close to where it begins and it has very little change in altitude (just a few feet). It is just shy of one mile long; about 1.2 kilometers.