Hawk Hollow

About Hawk Hollow

Hawk Hollow’s gently rolling landscape of meadows, mature woodlands and fens provides rich habitat for a wide variety of native plants and wildlife. This large preserve contains one of the largest unbroken blocks of grassland habitats in the county. This grassland is home to several uncommon bird species, including Henslow’s sparrows, bobolinks, eastern meadowlarks, grasshopper sparrows and savanna sparrows. It has 5.6 miles of trails that connect to Mallard Lake and West Branch forest preserves as well as the Bartlett Park District trail system. contains and a stretch of the West Branch DuPage River It also offers fishing and a 34-acre off-leash dog area.

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Oak Brook, IL

Volunteer with Openlands​

Connecting people to nature where they live.

As innovative protectors and stewards of the land since 1963, Openlands exists to create access to nature for all. Through local alliances, forward vision, and persistent action, Openlands connects and leads conservation work, serving as a guiding voice for communities, organizations, and more effective policy in northeastern Illinois and the surrounding region.

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Jean Franczyk

See you at the 2026 Openlands Annual Luncheon!

Join us on Oct. 21 for “From the Ground Up,” honoring Jean M. Franczyk and featuring Dr. Tessa Francis as keynote.