The Jeffrey pine and the ponderosa pine are common in drier montane areas of the Sierra Nevada. They are often confused by casual observers. Across the remainder of the American West, Jeffrey pine is absent, with ponderosa pine being the sole yellow pine. Ponderosa pine-dominated forests (“Ponderosa pine forest”) occur at elevations from about 300 to 2,100 m (980 to 6,890 ft). Ponderosa pine forests occurs on the Colorado Plateau and in the Sierra Nevada of the Western United States, as well as other parts of North America.