Newberry is a broad shield-shaped volcano in central Oregon that rises a mile above sea level. It has been constructed by thousands of eruptions, including at least 25 in the last 12,000 years. Newberry covers the most area and has the highest volume of any volcano in the Cascade Volcanic Arc.
One of the Northwest’s greatest undiscovered gems, Newberry National Volcanic Monument encompasses 55,500 acres in central Oregon's high desert and is an absolute geological wonder. The Monument was dedicated in 1990 to protect Newberry Volcano, a relatively low-lying yet massive shield volcano
The Three Sisters volcanoes, all rising above 3000 meters, form the most prominent landmarks of the central Oregon Cascades. All three volcanoes ceased erupting during the Pleistocene, but flank vents of South Sister on the left and North Sister on the right have erupted in the past few thousand years.
Some the more than 400 cinder cones that dot the flanks of the massive 30 x 60 km wide Newberry shield volcano in Oregon are seen in this view from Paulina Peak on the south rim of Newberry caldera. The cinder cones at Newberry are most abundant on the north and south flanks. Many are of Pleistocene age, but cinder cones along a rift on the NW flank and some on the south flank have erupted during the Holocene.