Belknap Crater

The volcano Belknap lava flows in the foreground

The Belknap Crater is a shield volcano in the U.S. state of Oregon. The mountain is located north of the South Sister volcano. Around 1030 BC ± 300 years occurred in this area several outbreaks in which emerged a large number of volcanic cones, cinder cones and lava flows that extended in a westerly direction up to a distance of 15 km. These eruptions are among the most recent volcanic events in the Cascade Range.

The last two eruptions have been dated using the radiocarbon method at a time around 800 BC ± 300 years as well as around the year 480. Currently there are no volcanic activities are observed.