Hoko soils are medial-skeletal. Oyhut soils have hard rock fragments. These soils are on till plains, mountain sides and mountain valleys at elevations of 30 to 800 feet. Slopes are 1 to 65 percent. They formed in alpine glacial till that include local Olympic basalt, graywacke, shales, and argillite.
Copalis soils are in a humid climate with relatively cool summers and mild, wet winters.
The frost-free period is 140 to 210 days. These are the Halbert , Nordby , Nemah , O'Brien , amd Willaby soils. Halbert and Nemah soils are poorly drained. Nordby, O'Brien, and Willaby soils lack medial properties in the control section. A perched water table is present at 2.0 to 3.0 feet from November to April.