Due SW of Hay Mtn. is a fairly large elevation feature not bearing a name. It lies on a NW trending line between the Mule Mtns. and Tombstone Hills.
Don't see any Earp Ridge notations anywhere around Tombstone, but it could be a local knowledge and lore name nearly lost in time - that's something Briscoe would do.
There's quite a bit of terriain feature not named on the USGS Topo. maps, too many to list / mark. Locals and prospectors would almost certainly have names for many, simply to facilitate communicating about them and navigating among them.
The area fascinates me.