ALBUQUERQUE, New Mexico – At this point on the 2.2-mile loop trail in the back of Rinconada Canyon in the Petroglyph National Monument, we are able to see 300 petroglyphs – the largest concentraion of petroglyphs in this Canyon. Petroglyph National Monument protects one of the largest petroglyph sites in North America, featuring designs and symbols carved onto volcanic rocks by Native Americans and Spanish settlers. Currently using relative dating methods, archeologists are arriving at the conclusion that these petroglyphs were created between 1000 B.C. and A.D. 1700.