Last Sunday our hiking group ventured up to Copper Harbor. After meeting at the visitor center in town, we drove out past the end of US 41 to take a little over 4-mile roundtrip hike to Horseshoe Harbor. Along the way we made a slight detour off the road we were hiking on to examine petroglyphs in a rocky outcrop. There is plenty of speculation about their age, but consider me a skeptic regarding those asserting them to be old.