Chronologs

Welcome to the chronologs!  The chronologs are a collection of pictures taken from the same spots over a period of time.  This allows the viewer to see the same areas as the seasons change.  There are two chronolog stations located in the park.  One is located at the Oak Opening Terrace Overlook, along the Lake Defiance Trail.  The other is located at the Black Tern Marsh West Overlook in the McHenry Dam Day Use Area.  Use the links below to view the chronologs, and if you are in the park, visit the chronolog stations to add your images.