The east parking lot at Heron Rookery provides access to a 3. 3-mile trail along the Little Calumet River, with a large gravel lot accommodating buses and RVs.

The trail offers fishing opportunities during spring and fall salmon and trout spawning runs, though the packed dirt and clay surface can be muddy and slippery—wear appropriate footwear. No restrooms or potable water are available at this access point.