The 213-acre Raccoon Grove Nature Preserve was acquired between 1937 and 1992.
The preserve is part of the Rock Creek preservation system, which conserves more than 460 acres of land.
Cultural resources protected at the preserve include part of a reservation granted to the daughters of a Potawatomi woman named Marie Bailly in 1832.
A 211-acre portion of the site was dedicated as an Illinois Nature Preserve in 1989. This dedication provides permanent protection for the natural resources at the preserve.
Raccoon Grove Nature Preserve protects a diversity of habitats, including forest, prairie, savanna, wetland, and a portion of Rock Creek.
Wildlife found at the preserve includes the tiger salamander and more than 80 bird species, including the scarlet tanager and eastern wood pewee.
The preserve is also home to a variety of plant species, including white, bur, and black oak, shagbark hickory, and sugar maple trees. It also features a spectacular display of spring wildflowers, such as blue-eyed Mary and Virginia bluebell.