Common sunflowers on O'Leary Peak is a lava dome volcano, not a cinder cone like Sunset Crater Volcano.
north of Sunset Crater National Monument. Sunset Crater Volcano Roughly 900 years ago, the eruption of this volcano reshaped the surrounding landscape, forever changing the lives of people, plants and animals. Hike the trail through the lava flow and cinders and you’ll likely discover colorful, ruggedly dramatic geological features coexisting with twisted Ponderosa Pines and an amazing array of wildlife.