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.
(Not verified at present) In New Mexico the highest point of the range is North Anthonys Nose at 5388 ft. Hueco Mountains  This range in Otero County also extends into Texas and the highest point there has not been determined. In New Mexico the highest peak is Bassett BM, 6057 ft., on the Mountain Tank map.