US Army Corps of Engineers
Albuquerque District Website

JMD Petroglyphs
These archaic anthropomorphic (top left) and representational protohistoric (buffalo and cattle) pecked petroglyphs at John Martin Reservoir, Colorado, may date from approximately 5000 B.C. to about 1880 A.D. Petroglyph panels and other cultural resources located on public lands belong to all Americans and are protected by the National Historic Preservation Act. Please photograph but do not touch or deface these historic properties.

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Photo by: Gregory D. Everhart |  VIRIN: 110324-A-CE999-001.JPG