So we have seen these historic sites and objects, some close to 100 years old. However people have existed in the same areas for much longer. These sites, while a little harder to find, have persisted for centuries – some for thousands of years. I think the oldest recorded site in California is over 10,000 years old! In the picture above we found two archaeological sites in this valley and believe that it is likely that there are probably more sites deeper down in the ground. Hundreds of years of erosion and soil development essentially cap sites. Here are two of the artifacts that were discovered close to the surface.