More than 1000 petroglyphs and some pictographs are known in the canyon. Some of the rock art in this area may be 7500 years old.

One way the Army "protects" chop them out of the rock:

Petroglyphs next to an early corral

The Army presently has "protective fencing" on 106 National Register properties on the Pinon Canyon Maneuver Site, but the following register of NATIONAL historic places lists 2,614.1 acres that need to be protected from mortars, rockets, tank shells, bombs, and small arms fire:

Aboriginal Prehistoric 1,694.1 378
Rock Art Prehistoric 130.9 60
Euroamerican Historic 693.1 233
Adam and Bessie Arnett Homestead 19th century 47.7 1 25
Samual Taylor Browns Sheep Ranch 19th century 11.3 1 8
John Sanders Cross Homestead 19th century 7.7 1 5
Asa T. Haines Homestead 19th century 13.1 1 6
Mary Doyle Claim 20th century 14.7 1 7
Moses B. Stevens Homestead 20th century 4.5 1 6

Over 700 Fort Carson/PCMS archeological sites are eligible for the National Register of Historic Places.

To date, Fort Carson has recorded 3,106 cultural resource sites on the PCMS. Of these, Fort Carson and the Colorado State Historic Preservation Office have determined that 684 sites are eligible for the National Register of Historic Places. The oldest site is an Early Archaic campsite dating back to approximately 7,500 years ago. The oldest structures date back to the Hispanic occupation of southern Colorado in the mid-19th century Apishapa villages dating back to the 11th-13th century, occupied by Native Americans who were contemporary with the Anasazi cliff dwellers at Mesa Verde, were recorded in 1996.

Nine National Register Districts include 677 eligible sites and seven sites are eligible for nomination to the National Register on their own merit.

Map of some archeological sites listed for protection n the expansion areas:

Map of "fenced" National Register Sites in Area 10, and eligible properties (Yellow):

Map of National Register Sites on Area 7 (Yellow):