S.P. Crater--Today on Land Lines, Michael Collier and Rose Houk take us to S.P. Crater near Flagstaff. Early cowboys gave this perfectly shaped cinder cone its initials--whose shape reminded them of a ……chamber pot.
Climbing the steep slopes of S.P. Crater, you take one step forward and two steps back in the loose black cinders. This beautifully symmetric cone, about thirty miles north of Flagstaff, reminded local cowboys a century ago of the shape of a chamber pot, thus the initials S.P. As the old wranglers used to say, Volcanoes happen.