Certainly an aircraft wing. I suspect that if you show it to an experienced airframe mechanic, he will get it identified. The rib construction, length of the squarish aileron, and the triangular aileron ribs are distinctive. If it's a near complete wing, it was a small plane, on the order of a Mooney Mite. (It's not a Mite. Wrong construction.) Worth looking into. Might be a known crash. Unless it's military, they don't necessarily get cleaned up. But the rest could be there at some distance or in the water. NTSB has an online searchable database of civil crashes from 1962. Out west, there are plenty of undiscovered crash sites. They're sometimes found while looking for a new crash. If it's an unknown, I suspect you'll ba back out there looking for personal effects if they can find the fuselage or old tree damage where it hit.