Pendleton is a city of 17,000 people (2019) in Eastern Oregon. The city is set in a pleasant valley set among hilly cropland on the I-84 several hours east of Portland. It is the location of one of the manufacturing plants of Pendleton Woolen Mills.
Tree regeneration is dominated by several invasive tree species, particularly horse chestnut (Aesculus hippocastanum), holly (Ilex aquifolium) and cherry laurel (Prunus laurocerasus).