The 175-acre Colvin Grove Preserve was acquired between 1991 and 2007. The preserve is part of the Rock Run preservation system, which conserves more than 1,450 acres of land.
Colvin Grove Preserve is located west of Houbolt Road between Jefferson Street and I-80 in Joliet. Street parking is available on Springwood Drive.
http://www.tripleblaze.com/trail.php?c=3&i=8414