Willamette National Forest.

Image: “Boulders and Moss at Opal Creek Pool, Willamette National Forest” by U.S. Forest Service- Pacific Northwest Region, licensed Public domain, from Wikimedia Commons.

Credit and licence

Creator
U.S. Forest Service- Pacific Northwest Region
Licence
Public domain
Terms
Public domain: no known copyright restrictions. Credit given as a courtesy.
Source
Wikimedia Commons
Credit line
“Boulders and Moss at Opal Creek Pool, Willamette National Forest” by U.S. Forest Service- Pacific Northwest Region (Public domain), via Wikimedia Commons