Spring Moutains = No Petrolgyphs

 Why are there no petroglyphs or Native American sites in the Spring Mountains?

I was up in the Wheeler Pass area behind Wheeler Peak looking for petroglyphs today. Of course I have never heard of petroglyphs up there or seen any and I started wondering why? All of the petroglyphs and Native American sites in the Southern Nevada area that I have found are in the lower elevation areas where there are no trees. It would make sense to me that the natives would hunt in the Spring Mountain area because it plays host to a large assortment of game animals, so why don't we find Native American relics up here? 

The way I see it, there are several reasons that can explain this.

A: the native peoples of this area liked hunting in the lower desert area because of line of sight. The forest of trees in the spring mountain area makes it difficult, if not impossible to be able to spot game from far away. Maybe they never quite mastered or even tried to hunt in the higher elevations in the trees.

B: There are sites here, they just got overgrown by trees and other brush and therefor stay hidden from site, or there are no trails going near where these sites are. There are vast amounts of wilderness in the Spring Mountains where there are no trails currently. Just because there isn't a trail now doesn't mean there wasn't a trail there long ago.

C: People visiting this beautiful area for the last 150 years or so already found all of the Native American relics and either took them home or destroyed them. There is evidence of Mormons in this area long ago. Mormons believe Native Americans are actually of Jewish descent who were sent here by God around 1400 BC. But if the Mormons took all of the Native American relics here, why didn't they take them in other areas where Native relics can be found near Mormon settlements?

D:We do know that the Spring Mountain area is considered a "Land Island", meaning the terrain in this area is greatly higher in elevation than the surrounding areas and therefor the animal and plant life in this area is entirely different than the animal and plant life in the surrounding lower elevation area. It is thought that being in such isolation causes species to evolve differently than in other areas, so we get some species that are specific to these areas. Maybe the natives were unfamiliar with these species, and this type of terrain and never actually tried their hands up there...