While traveling to Big Round Top via South Confederate Avenue, one drives (or walks) across Plum Run on an unassuming stone bridge and passes by evidence of the wildlife that once roamed here. Long before the Battle of Gettysburg occurred, dinosaurs roamed the area and left their mark. Located on the bridge are three dinosaur footprints.
On one side is the print of Anchisauripus sillimani, a two-legged lion-sized meat eater. On the other are the prints of a dog-sized plant eater, Atreipus milfordensi. The bridge was made in 1938 from sandstone or siltstone taken from the Trostle Quarry in Adams County, Pennsylvania.
There is nothing to indicate they are there so enjoy hunting for dinosaur tracks!
Know Before You Go
The road is currently closed so it’s a half-mile walk to the site. Park in the picnic area at 18 S Confederate Ave and enjoy the walk through history!