Theodore Marsh
About Theodore Marsh
Theodore Marsh protects a diversity of habitats, including forest, prairie, wetland and a portion of Rock Run.
Wildlife found at the preserve includes more than 100 bird species, such as the pie-billed grebe.
The preserve is also home to a variety of plant species, including velvety white vervain, smooth blue aster and marsh bellflower.
More to Explore in Will County, IL
Volunteer with Openlands
July 22, 2026
July 22, 2026
July 23, 2026
July 23, 2026
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.
