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Largest Black Cottonwood Tree in the United States - Marion County, Oregon
Posted by: Groundspeak Regular Member ddtfamily
N 45° 04.712 W 123° 03.084
10T E 495954 N 4991675
Quick Description: The largest black cottonwood in the U.S. at historic Willamette Mission Park
Location: Oregon, United States
Date Posted: 8/26/2013 6:43:04 AM
Waymark Code: WMHY48
Published By: Groundspeak Premium Member Dorcadion Team
Views: 3

Long Description:
The largest black cottonwood tree in the United States is located at the historic Willamette Mission State Park in Marion County, Oregon. The tree, scientific name "Populus Tirchocarpa," is believed to have started growing around the year 1734. According to the almost 20 year old sign, it is 158 feet tall with a circumference of 26ft, 8 inches and a spread of 110 feet.

GPS coordinates for this waymark are from the location of the sign, the best vantage point to see the entire tree. A closer view of the tree is from 45° 4.624'N, 123° 3.077'W, but that location does not allow as good a perspective for photography as you are too close to the tree.


Click a photo to enlarge
Genus/Species: Black Cottonwood (Populus Tirchocarpa)

Height: 158

Girth: 27

Method of obtaining height: Reliable source

Method of obtaining girth: Reliable source

Location type: Park

Age: 279

Historical significance:
The tree is nearly 300 years old, predating "white" settlement in the area by about 100 years.


Website reference: [Web Link]

Walk time: 3

Planter: Not listed

Parking coordinates: Not Listed

Photograpy coordinates: Not Listed

Visit Instructions:
A closeup picture of your GPS receiver in your hand, with the tree in the background, is required. If the tree is on private property, this closeup photograph with the tree in the background may be taken from the nearest public vantage point without actually going to the tree.
The required photograph does not need to show the entire tree, but the individual tree must be recognizable.
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