Colvin Grove (formerly “Middle Rock Run”) currently contains 175 acres linking Joliet Park District and Joliet Junior College properties. It was purchased between 1991 and 2006 along the east channel of Rock Run to protect the historic Colvin grove, and eliminated a gap in the Rock Run Greenway.

Ongoing preservation seeks to continue along the west channel. The Rock Run Greenway trail passes through the Preserve.

Photograph Courtesy of Glen Buckner