Anyone been to Jeffers Petroglyphs?

“Just wonderin'... I keep thinking of going there... and to Blue Mound State Park.

Jeffers is Minnesota Historical Society. I see they have a cool event on July 31, "Once in a Blue Moon." (yes, there are TWO full moons in July) Also a geology discovery day on Aug. 14.

I think it's about 4 hours away... ALMOST South Dakota (course, that would be SIOUX FALLS, SD -- the OPPOSITE side of state from Black Hills. LOL)”