Fall generally offers ample opportunities to find all sorts of fungus in the preserves and as cooler, wet weather moves in, be on the lookout while on the trails.
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The 445-acre Hammel Woods was acquired between 1930 and 2011.
The preserve is part of the DuPage River preservation system, which conserves more than 1,500 acres of land.
The first 147 acres of Hammel Woods were the District's second and third acquisitions in 1930. The preserve is located at the site of the historic Grinton Mill and was named in honor of American soldiers who fought in the World War I battle in Hamel, France.