Subdivisions. The Ordovician is the second period of the Paleozoic era. The Ordovician began after the end of a series of extinction events known as the Ordovician-Silurian extinction events which ended around 488 mya.
As a state highpointer, Humphrey's Peak in Arizona was on my bucket list. The trailhead was easy to find. The trail itself was not well maintained and rather rocky, which wasn't too bad going up, but required a lot of caution descending to protect your knees.
Located just 7 miles north of downtown Flagstaff, Arizona, the San Francisco Peaks is the highest mountain range in Arizona at an elevation of over 12,600 feet. The San Francisco Peaks is home to the Arizona Snowbowl ski slopes and winter playground.