Scenes like this are common on the lower Tualatin river. Oregon ash (Fraxinus latifolia) trees are very common around water in Oregon. They are tolerant of saturated soil and can tolerate having their roots submerged for extended periods.
The Tualatin River begins in the Coast Range west of Portland, Oregon and meanders through a partly rural, increasingly urban valley for 83 miles until it joins the Willamette River near West Linn, a few miles upstream from Portland.
This picture was taken from the Shamberg Bridge on Roy Rogers Road, just north of Sherwood, Oregon in the Tualatin National Wildlife Refuge. Since the time when I took this photo, this road has been straightened and converted to a high use, high speed arterial. In the interest of safety, I recommend not using it for a photo platform today.
Ash Creek Images
Photographs of the West by Doug Gorsline
On a Foggy Winter Morning, Oregon Ash Trees Overhang the Tualatin River.