Warrenville Grove

About Warrenville Grove

Warrenville Grove’s rolling topography consists of floodplain and upland woodlands, natural fens and the West Branch DuPage River. Its upland woodlands — some natural and some reforested — contain oak, maple and walnut species. The preserves’ fens — some natural and some in need of restoration — are delicate ecosystems containing rare vegetative species.

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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.