^Jim E. O'Connor; Rebecca J. Dorsey; Ian P. Madin (May 14, 2012). Volcanoes to Vineyards: Geologic Field Trips Through the Dynamic Landscape. p. 260. ISBN9780813700151. Retrieved December 10, 2012. All Boring volcanic centers are extinct, but the Boring Volcanic Field presumably is not. The most recent eruptions in Portland-Vancouver metropolitan area occurred ~100,000 years ago and the age of the youngest dated center, Beacon Rock at the east edge of the Boring Volcanic Field, is 57 ka.